These tests set `LOCAL_MODULE_TARGET_ARCH := arm x86` unless
TARGET_ENABLE_MEDIADRM_64 is true, so for 64-bit-only configurations
that don't set this, these tests are disabled.
Test: lunch armv8-eng; m nothing -> see fewer warnings
Change-Id: I7ca0e8c382eb9930b8b1477ee8c9f1ea40c6888f