android_frameworks_base/media/tests

MediaFrameworkTest/
    Uses instrumentation and so can be run with runtest.
    It assumes /sdcard/media_api/ has been populated.

contents/media_api/
    Push to /sdcard/media_api/ for use with MediaFrameworkTest:
    adb shell mkdir /sdcard/media_api
    adb push contents/media_api/ /sdcard/media_api/

All other subdirectories are manual tests or sample apps.