Add generic SelectTest JUnit filter and CoreTestsFilter

The JUnit filter com.android.test.filters.SelectTest is a generic test
filter that can supersede |-e package| and |-e class| options of
AndroidJUnitRunner.

The com.android.server.wm.test.filters.CoreTestsFilter extends SelectTest
filter to filter out Window Manager Service releated tests in
FrameworksCoreTests.

Bug: 122451194
Test: Can select some tests from WmTests.
  $ adb shell am instrument -w \
      -e filter com.android.test.filters.SelectTest \
      -e selectTest com.android.test.filters.,com.android.server.wm.DockedStackDividerControllerTests \
      com.android.frameworks.wmtests/androidx.test.runner.AndroidJUnitRunner
Test: CoreTestsFilter works for FrameworksCoreTests.
  $ adb shell am instrument -w \
      -e filter com.android.server.wm.test.filters.CoreTestsFilter \
      -e selectTest_verbose true \
      com.android.frameworks.coretests/androidx.test.runner.AndroidJUnitRunner

Change-Id: Ic72637997bf17debef914e2596049f6cf3e753de