tree a97e06e75c1776ef40b79dfe08bc34b83472529e
parent 90ef3eb2c1e44353ab97161cba7660644bc56a1c
author Midas Chien <midaschieh@google.com> 1592646723 +0800
committer Midas Chien <midaschieh@google.com> 1593497754 +0000

display: cache display lpm state to avoid set it again

If current foss state same as desired state, doesn't set it again.

Bug: 148656663
Test: stress on/off battery saver and check foss state
Test: enable battery saver, stress on/off screen
Change-Id: I6298361fd6a5d6a86c94eabb71ab254507136fd3