Move simple WindowManager tests to WmTests

Bug: 113800711
Test: Pass all WM presubmit tests in WmTests
  $ tradefed.sh run commandAndExit WmTests \
      --include-filter com.android.server.wm. \
      --include-annotation android.platform.test.annotations.Presubmit \
      --exclude-annotation androidx.test.filters.FlakyTest
Change-Id: I28076aad00b0fe4b4d35552677436e0f3e37eafe