Merged from http://go/wvgerrit/67523
This is in preparation for adding the Full Decryption Path Test
android application so it will reside under
vendor/widevine/libwvdrmengine/test/java.
Test: build and run MediaDrmAPITest.apk from the new directory
bug: 113594822
Change-Id: If4adb51ba7bb24a5e28e04956909c2d5a1af3c53