Merge "libgui: Enable ThinLTO" am: 6a09516b00 am: 33cc3e5eae

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1605238

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: If299899e53b0ebe5c7e3c99950838f5464754423