Bump to xamarin/monodroid@9ca6d9f6 (#8895)

Context: 86260ed
Context: #8478
Context: #8895

Changes xamarin/monodroid@a574222...9ca6d9f.

  * xamarin/monodroid@9ca6d9f64: [tools/msbuild] fix fastdev of Localization assemblies (xamarin/monodroid#1464)
  * xamarin/monodroid@418b1ece6: Remove "Xamarin" from messages (xamarin/monodroid#1468) (xamarin/monodroid#1469)
  * xamarin/monodroid@07803812f: Revert "Remove "Xamarin" from messages (#146xamarin/monodroid8)"
  * xamarin/monodroid@cf71c7e6e: Remove "Xamarin" from messages (xamarin/monodroid#1468)

Commit 86260ed altered packaging so that *all* assemblies were
considered to be ABI-specific, removing even the *idea* of
"CPU-agnostic assemblies".

This had unforeseen breakage: localization-specific `.resx` & related
files were no longer fast deployed to the correct location, breaking
*all* of our localization unit tests.

This wasn't found in PR #8478 because the localization tests which
broke were only run on *nightly* builds, and not run as part of the
normal PR process.

Oops.

The root cause of this is that the `%(TargetPath)` metadata on
Satellite assemblies is set to `%(Culture)\%(Filename)%(Extension)`
by default.  The code we had in place to set `%(TargetPath)` first
checked to see if it was empty.  In the case of `XX.resource.dll`
files, it was NOT empty, and as a result the `XX.resource.dll` files
would get deployed to `files/.__override__/%(Culture)` instead of
`files/.__override__/%(Abi)/%(Culture)`.

Because our assembly loader now *only* looks in the `%(Abi)` directory
for its files, the resources were never found.

xamarin/monodroid@9ca6d9f64 updates the `_ComputeFastDevFiles` target
to check the value of `%(TargetPath)` to see if it is the default
value, and if not then update it to use the `%(DestinationSubDirectory)`
value.

Update the `InstallTests.LocalizedAssemblies_ShouldBeFastDeployed()`
unit test to include application-based resource.dll files, so that
this failure can be caught during smoke testing.

Author: dellis1972

.external

@@ -1 +1 @@
-xamarin/monodroid:main@a5742221b314864636f4356173a2535a539c7b2c
+xamarin/monodroid:main@9ca6d9f64fce11f04d668ece50ada36de1d7efce

tests/MSBuildDeviceIntegration/Tests/InstallTests.cs

@@ -468,7 +468,7 @@ public void LocalizedAssemblies_ShouldBeFastDeployed ()
 			var app = new XamarinAndroidApplicationProject {
 				EmbedAssembliesIntoApk = false,
 			};
-			InlineData.AddCultureResourcesToProject (lib, "Foo", "CancelButton");
+			InlineData.AddCultureResourcesToProject (app, "Foo", "CancelButton");
 			app.References.Add (new BuildItem.ProjectReference ($"..\\{lib.ProjectName}\\{lib.ProjectName}.csproj", lib.ProjectName, lib.ProjectGuid));
 
 			using (var libBuilder = CreateDllBuilder (Path.Combine (path, lib.ProjectName)))