Migrate to Android Testing Support Lib (part 4/N)

This CL converts 7 test classes under com.android.inputmethod.keyboard
to Android Testing Support Library.

This CL also fix missing annotations in KeyboardLayoutTest.

Bug: 110805255
Test: verified as follows. No new test failures.
        tapas adb LatinIME LatinIMETests arm64 userdebug && \
        DISABLE_PROGUARD=true make -j LatinIME && \
        adb install -r $OUT/system/app/LatinIME/LatinIME.apk && \
        atest LatinIMETests:com.android.inputmethod.keyboard
Change-Id: I8ab9e3329f159f0df02812fafe44c25efa76c0d1
8 files changed
tree: a34a6403a638316eb7f3cffcbed09fa3d61b37a2
  1. common/
  2. dictionaries/
  3. java/
  4. native/
  5. tests/
  6. tools/
  7. Android.mk
  8. CleanSpec.mk