Migrate start-emulator to dotnet.

Author: jpobst

build-tools/automation/yaml-templates/stage-msbuild-emulator-tests.yaml

@@ -52,12 +52,7 @@ stages:
           --outfile="$(System.DefaultWorkingDirectory)/bin/Test$(XA.Build.Configuration)/MSBuildDeviceIntegration/${{ parameters.target_framework }}/MSBuildDeviceIntegration.runsettings"
       displayName: Slice unit tests
       
-    - task: MSBuild@1
-      displayName: start emulator
-      inputs:
-        solution: tests/Mono.Android-Tests/Mono.Android-Tests.csproj
-        configuration: $(XA.Build.Configuration)
-        msbuildArguments: /t:AcquireAndroidTarget /bl:$(System.DefaultWorkingDirectory)/bin/Test$(XA.Build.Configuration)/start-emulator.binlog
+    - template: start-emulator.yaml
 
     - template: run-nunit-tests.yaml
       parameters:
@@ -121,12 +116,13 @@ stages:
         artifactName: $(TestAssembliesArtifactName)
         downloadPath: $(System.DefaultWorkingDirectory)/bin/Test$(XA.Build.Configuration)
 
-    - task: MSBuild@1
-      displayName: install and launch emulator
-      inputs:
-        solution: tests/Mono.Android-Tests/Mono.Android-Tests.csproj
-        configuration: $(XA.Build.Configuration)
-        msbuildArguments: /t:InstallAvdImage;AcquireAndroidTarget /p:TestDeviceName=$(deviceName) /p:TestAvdApiLevel=$(avdApiLevel) /p:TestAvdAbi=$(avdAbi) /p:TestAvdType=$(avdType) /bl:$(System.DefaultWorkingDirectory)/bin/Test$(XA.Build.Configuration)/install-emulator-$(avdApiLevel).binlog
+    - template: start-emulator.yaml
+      parameters:
+        installImage: true
+        installDeviceName: $(deviceName)
+        installAvdApiLevel: $(avdApiLevel)
+        installAvdAbi: $(avdAbi)
+        installAvdType: $(avdType)
 
     - template: run-nunit-tests.yaml
       parameters:

build-tools/automation/yaml-templates/start-emulator.yaml

@@ -0,0 +1,18 @@
+parameters:
+  installImage: false    # 'true' to create a new specific AVD image emulator, if 'true', other 'install*' parameters must be provided
+  installDeviceName:     # Device name to install, like 'wear_square'
+  installAvdApiLevel:    # Device API level to install, like '30'
+  installAvdAbi:         # Device ABI to install, like 'x86'
+  installAvdType:        # Device AVD to install, like 'android-wear'
+
+steps:
+# This uses our in-tree 'dotnet' because the system one may not have the 'android' workload installed.
+- template: run-dotnet-preview.yaml
+  parameters:
+    displayName: Start emulator
+    continueOnError: false
+    project: tests/Mono.Android-Tests/Runtime-Microsoft.Android.Sdk/Mono.Android.NET-Tests.csproj
+    ${{ if eq(parameters.installImage, true) }}:
+      arguments: -c $(XA.Build.Configuration) -t:InstallAvdImage;AcquireAndroidTarget -p:TestDeviceName=${{ parameters.installDeviceName }} -p:TestAvdApiLevel=${{ parameters.installAvdApiLevel }} -p:TestAvdAbi=${{ parameters.installAvdAbi }} -p:TestAvdType=${{ parameters.installAvdType }} -bl:$(System.DefaultWorkingDirectory)/bin/Test$(XA.Build.Configuration)/install-emulator-${{ parameters.installAvdApiLevel }}.binlog
+    ${{ else }}:
+      arguments: -c $(XA.Build.Configuration) -t:AcquireAndroidTarget -bl:$(System.DefaultWorkingDirectory)/bin/Test$(XA.Build.Configuration)/start-emulator.binlog