Move PhoneWindowManager tests to WmTests

Bug: 113800711
Test: Pass all PhoneWindowManager presubmit tests in WmTests
  $ tradefed.sh run commandAndExit WmTests \
      --include-filter com.android.server.policy. \
      --include-annotation android.platform.test.annotations.Presubmit \
      --exclude-annotation androidx.test.filters.FlakyTest
Change-Id: I806acaa9c62af4849bb5872f5821ee69600412a5