UI tests should be able to test both dev and store-released builds (#567)

Fixes #462

- Add x64 and x86 UI tests to the release builds (internal builds for the store)
- UI tests now accept the target app ID as a parameter in the runsettings file

build/pipelines/templates/run-ui-tests.yaml

@@ -2,6 +2,7 @@
 
 parameters:
   platform: ''
+  runsettingsFileName: ''
 
 jobs:
 - job: UITests${{ parameters.platform }}
@@ -44,6 +45,6 @@ jobs:
     inputs:
       testAssemblyVer2: $(Build.ArtifactStagingDirectory)/drop/Release/${{ parameters.platform }}/publish/CalculatorUITests.dll
       vsTestVersion: 16.0
-      runSettingsFile: $(Build.ArtifactStagingDirectory)/drop/Release/${{ parameters.platform }}/publish/CalculatorUITests.runsettings
+      runSettingsFile: $(Build.ArtifactStagingDirectory)/drop/Release/${{ parameters.platform }}/publish/${{ parameters.runsettingsFileName }}
       platform: ${{ parameters.platform }}
       configuration: Release