Merge "libgui: Enable ThinLTO" am: 6a09516b00 am: 33cc3e5eae am: 8737fd7465

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I2c5d056d35441bd9eb9a6dad85b65c64a9319125