[Xamarin.Android.Build.Tasks] Fix classes.dex deployment. (#236)

Context https://bugzilla.xamarin.com/show_bug.cgi?id=44633

Enabling <AndroidUseSharedRuntime> in some projects causes
`classes.dex` to not deploy to device.

For some bizzare reason when running a build vs XS the
AfterTargets are NOT being called for _CompileDex. As a
result the targets that need to be called to support
debugging are not being run.

This commit adds a bunch of new property extension points
which will allow the debugging targets to inject the
additonal target requirements directly rather than relying
on Before/After targets.

Author: dellis1972

src/Xamarin.Android.Build.Tasks/Xamarin.Android.Common.targets

@@ -366,6 +366,7 @@ Copyright (C) 2011-2012 Xamarin. All rights reserved.
 <Target Name="_BuildAdditionalResourcesCache"
 	Inputs="@(ReferencePath);@(ReferenceDependencyPaths)"
 	Outputs="$(_AndroidResourcePathsCache)"
+	DependsOnTargets="$(_BeforeBuildAdditionalResourcesCache)"
 	>
  <GetAdditionalResourcesFromAssemblies
    AndroidSdkDirectory="$(_AndroidSdkDirectory)"
@@ -508,7 +509,7 @@ Copyright (C) 2011-2012 Xamarin. All rights reserved.
 	</ItemGroup>
 </Target>
 
-<Target Name="_ValidateAndroidPackageProperties" DependsOnTargets="_ResolveMonoAndroidSdks">
+<Target Name="_ValidateAndroidPackageProperties" DependsOnTargets="$(_OnResolveMonoAndroidSdks)">
 	<CreateProperty Value="$(ProjectDir)$(AndroidManifest)" Condition="'$(AndroidManifest)' != ''">
 		<Output TaskParameter="Value" PropertyName="_AndroidManifestAbs"/>
 	</CreateProperty>
@@ -542,7 +543,7 @@ Copyright (C) 2011-2012 Xamarin. All rights reserved.
 </Target>
 
 <Target Name="_AddAndroidDefines"
-		DependsOnTargets="_ResolveMonoAndroidSdks">
+		DependsOnTargets="$(_OnResolveMonoAndroidSdks)">
 </Target>
 
 <Target Name="_GetReferenceAssemblyPaths">
@@ -612,14 +613,22 @@ Copyright (C) 2011-2012 Xamarin. All rights reserved.
 	</CreateItem>
 </Target>
 
-<Target Name="_SetupApplicationJavaClass" AfterTargets="_ResolveMonoAndroidSdks">
+<Target Name="_SetupApplicationJavaClass" AfterTargets="_ResolveMonoAndroidSdks" DependsOnTargets="$(_BeforeSetupApplicationJavaClass)">
 	<PropertyGroup>
 		<AndroidApplicationJavaClass Condition="'$(AndroidApplicationJavaClass)' == '' And $(AndroidEnableMultiDex)">android.support.multidex.MultiDexApplication</AndroidApplicationJavaClass>
 		<AndroidApplicationJavaClass Condition="'$(AndroidApplicationJavaClass)' == ''">android.app.Application</AndroidApplicationJavaClass>
 	</PropertyGroup>
 	<Message Text="Application Java class: $(AndroidApplicationJavaClass)" />
 </Target>
 
+
+<PropertyGroup>
+	<_OnResolveMonoAndroidSdks>
+		_ResolveMonoAndroidSdks
+		;$(_AfterResolveMonoAndroidSdks)
+	</_OnResolveMonoAndroidSdks>
+</PropertyGroup>
+
 <!--
 Resolves tools paths and SDK paths, and verifies everything is installed.
 If the framework directories haven't been resolved, it takes care of those too,
@@ -1018,7 +1027,7 @@ because xbuild doesn't support framework reference assemblies.
 <Target Name="_GenerateAndroidResourceDir"
 	Inputs="$(MSBuildAllProjects);@(AndroidResource);$(_AndroidBuildPropertiesCache)"
 	Outputs="@(_AndroidResourceDest)"
-	DependsOnTargets="_ResolveMonoAndroidSdks">
+	DependsOnTargets="$(_OnResolveMonoAndroidSdks)">
 	<CopyAndConvertResources SourceFiles="@(AndroidResource)"
 			DestinationFiles="@(_AndroidResourceDest)"
 			AcwMapFile="$(_AcwMapFile)"
@@ -1217,7 +1226,7 @@ because xbuild doesn't support framework reference assemblies.
 	<_UpdateAndroidResgenDependsOnTargets>
 		_CheckForDeletedResourceFile;
 		_ValidateAndroidPackageProperties;
-		_ResolveMonoAndroidSdks;
+		$(_OnResolveMonoAndroidSdks);
 		_GetLibraryImports;
 		_CheckDuplicateJavaLibraries;
 		_GetAdditionalResourcesFromAssemblies;
@@ -1423,7 +1432,7 @@ because xbuild doesn't support framework reference assemblies.
 <Target Name="_AddStaticResources"
 		Inputs="$(MonoPlatformJarPath);$(_AndroidBuildPropertiesCache)"
 		Outputs="$(_AndroidStaticResourcesFlag)"
-		DependsOnTargets="_GetMonoPlatformJarPath">
+		DependsOnTargets="$(_BeforeAddStaticResources);_GetMonoPlatformJarPath">
 	<CopyResource ResourceName="machine.config" OutputPath="$(MonoAndroidIntermediateAssetsDir)machine.config" />
   <CopyResource
     ResourceName="MonoRuntimeProvider.Bundled.java"
@@ -1661,7 +1670,7 @@ because xbuild doesn't support framework reference assemblies.
 </Target>
 
 <Target Name="_GenerateJavaStubs"
-  DependsOnTargets="_SetLatestTargetFrameworkVersion;_PrepareAssemblies"
+  DependsOnTargets="_SetLatestTargetFrameworkVersion;_PrepareAssemblies;$(_AfterPrepareAssemblies)"
   Inputs="$(MSBuildAllProjects);@(_ResolvedAssemblies);$(_AndroidManifestAbs);$(_AndroidBuildPropertiesCache)"
   Outputs="$(IntermediateOutputPath)android\AndroidManifest.xml;$(_AcwMapFile);$(_AndroidTypeMappingJavaToManaged);$(_AndroidTypeMappingManagedToJava)">
   <GenerateJavaStubs
@@ -1832,14 +1841,15 @@ because xbuild doesn't support framework reference assemblies.
 		_FindJavaStubFiles;
 		_AddStaticResources;
 		_GetMonoPlatformJarPath;
-		_ResolveMonoAndroidSdks;
+		$(_OnResolveMonoAndroidSdks);
 		_GetLibraryImports;
 		_CheckDuplicateJavaLibraries;
 		_CreateBaseApk;
 		_GetAdditionalResourcesFromAssemblies;
 		_CreateAdditionalResourceCache;
 		_DetermineJavaLibrariesToCompile;
 		$(_CompileJavaDependsOnTargetsForJack);
+		$(_CompileJavaDependsOnTargets)
 	</_CompileJavaDependsOnTargets>
 </PropertyGroup>
 
@@ -2139,6 +2149,7 @@ because xbuild doesn't support framework reference assemblies.
 		_LinkAssemblies;
 		_GetAddOnPlatformLibraries;
 		_CompileDex;
+		$(_AfterCompileDex);
 		_CompileJava;
 		_CreateBaseApk;
 		_PrepareAssemblies;
@@ -2252,7 +2263,7 @@ because xbuild doesn't support framework reference assemblies.
 	</_CopyPackageInputs>
 </PropertyGroup>
 
-<Target Name="_DefineBuildTargetAbis">
+<Target Name="_DefineBuildTargetAbis" DependsOnTargets="$(_BeforeDefineBuildTargetAbis)">
 	<CreateProperty Value="$(AndroidSupportedAbis)" Condition="'$(_BuildTargetAbis)' == ''">
 		<Output TaskParameter="Value" PropertyName="_BuildTargetAbis"/>
 	</CreateProperty>
@@ -2314,7 +2325,7 @@ because xbuild doesn't support framework reference assemblies.
 </Target>
 
 
-<Target Name="_ResolveAndroidSigningKey" DependsOnTargets="_ResolveMonoAndroidSdks">
+<Target Name="_ResolveAndroidSigningKey" DependsOnTargets="$(_OnResolveMonoAndroidSdks)">
 	<!-- would use a PropertyGroup here but xbuild doesn't support it -->
 	<CreateProperty Value="$(_ApkDebugKeyStore)" Condition="'$(AndroidKeyStore)'!='True'">
 		<Output TaskParameter="Value" PropertyName="_ApkKeyStore"/>
@@ -2433,7 +2444,7 @@ because xbuild doesn't support framework reference assemblies.
 <PropertyGroup>
 	<_BuildApkDependsOnTargets>
 		Build
-		;_ResolveMonoAndroidSdks
+		;$(_OnResolveMonoAndroidSdks)
 		;_ValidateAndroidPackageProperties
 		;_BuildApkEmbed
 	</_BuildApkDependsOnTargets>