Removes a few more Android.mk files. Test: check for adb, mkbootfs, and fastboot in the build artifacts Change-Id: Ie4e50a363a734d0b9207f0d0098c54719f038e76
Test: cd system/core; mma Test: check for mkbootfs in build artifacts Test: out/host/linux-x86/nativetest64/libcrypto_utils_test/libcrypto_utils_test Test: out/host/linux-x86/nativetest64/libnativebridge-tests/*_test Change-Id: I71141bd85f052d5d86763a8b79b219cc4c46aafb