Re-enable ThinLTO for libmedia_jni and libaudioeffect_jni

This partially reverts commit cd1e70b874f811e74efb20f650cf427cc685c2b6.

Breakages are fixed in the current stable Clang.

Test: presubmit
Bug: 169004486
Change-Id: I545553eccf9ed83864158087c5746923c3d452d5
2 files changed