[automerger skipped] Merge "Support for showing percent progress in boot animation." am: 87d840ad am: b86c3a34 am: 8bd985ef -s ours am: 8e1bb092 -s ours

am skip reason: Change-Id I2d936e3391f56796308c90deb39ecacc58797721 with SHA-1 41fffb49 is in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1545805

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic37ce91ed39ee9e5558d18167b8ea47f2f919d52