Merge "AutoBrightness: Remove handler's messages before send." am: b3230cd639 am: b5d7cf8e9e am: 8ba0cd74bf

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1456125

Change-Id: I2961477c0d13707961906eaab49aff5444d63339