test/Android.mk: import LICENSE indicators from AOSP

https://android-review.googlesource.com/c/platform/external/libvpx/+/1853628
https://android.googlesource.com/platform/external/libvpx/+/e40f8afb1e51d3bd13d662c1881e3cfb616fa2b8

Change-Id: I15f185ab7c7661f4456c4ad7296fdda01dfb8d53
1 file changed