Android mainline 11.0.0 release 18
display: cache display lpm state to avoid set it again am: 6bd8a847b8

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/pixel/+/11881998

Change-Id: I2b1996363f6b41ab55b6d7b1e50b353316f906b7