[Java.Runtime.Environment] Fix CS0436 warnings (dotnet#799)

Fixes: dotnet#792

Commit cba6137 added `[assembly: InternalsVisibleTo]`, allowing the
internal types from `Java.Interop.dll` to be seen from/used by
`Java.Runtime.Environment.dll`, so that `MonoRuntimeValueManager`
could use the type `JniLocationException`.

The downside to this change is that types internal to
`Java.Interop.dll` were visible to `Java.Runtime.Environment.dll`.
Types such as `Java.Interop.NativeMethods`, which "conflicts" with
`Java.Interop.NativeMethods` type in `Java.Runtime.Environment.dll`.

The result: 31 CS0436 warnings were introduced with commit cba6137:

	Java.Interop/MonoRuntimeObjectReferenceManager.cs(16,14):
	warning CS0436: The type 'NativeMethods' in '…/src/Java.Runtime.Environment/Java.Interop/JreRuntime.cs'
	conflicts with the imported type 'NativeMethods' in 'Java.Interop, Version=0.1.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065'.
	Using the type defined in '…/src/Java.Runtime.Environment/Java.Interop/JreRuntime.cs'.

Fix these warnings by *removing* the `[assembly: InternalsVisibleTo]`
added in cba6137, and copy `JniLocationException` into
`Java.Runtime.Environment.dll`, renamed as `OverrideStackTrace`.

Author: jonpryor

src/Java.Interop/Properties/AssemblyInfo.cs

@@ -28,10 +28,3 @@
 	"814f144e5d817efc4c6502cc012df310783348304e3ae38573c6d658c234025821fda87a0be8a0" +
 	"d504df564e2c93b2b878925f42503e9d54dfef9f9586d9e6f38a305769587b1de01f6c0410328b" +
 	"2c9733db")]
-[assembly: InternalsVisibleTo (
-	"Java.Runtime.Environment, PublicKey=" +
-	"0024000004800000940000000602000000240000525341310004000011000000438ac2a5acfbf1" +
-	"6cbd2b2b47a62762f273df9cb2795ceccdf77d10bf508e69e7a362ea7a45455bbf3ac955e1f2e2" +
-	"814f144e5d817efc4c6502cc012df310783348304e3ae38573c6d658c234025821fda87a0be8a0" +
-	"d504df564e2c93b2b878925f42503e9d54dfef9f9586d9e6f38a305769587b1de01f6c0410328b" +
-	"2c9733db")]

src/Java.Runtime.Environment/Java.Interop/MonoRuntimeValueManager.cs

@@ -236,7 +236,7 @@ public override IJavaPeerable PeekPeer (JniObjectReference reference)
 		static Exception CreateJniLocationException ()
 		{
 			using (var e = new JavaException ()) {
-				return new JniLocationException (e.ToString ());
+				return new OverrideStackTrace (e.ToString ());
 			}
 		}
 
@@ -402,5 +402,21 @@ partial class NativeMethods {
 		[DllImport (JavaInteropLib, CallingConvention=CallingConvention.Cdecl)]
 		internal static extern void java_interop_gc_bridge_wait_for_bridge_processing (IntPtr bridge);
 	}
+
+	sealed class OverrideStackTrace : Exception {
+
+		readonly    string  stackTrace;
+
+		public OverrideStackTrace (string stackTrace)
+		{
+			this.stackTrace = stackTrace;
+		}
+
+		public override string StackTrace {
+			get {
+				return stackTrace;
+			}
+		}
+	}
 }