Merge "profcollect: trace on background thread" am: f8eb7b136c am: d353c81c5c am: e54991b72d am: b2bed05872

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1894997

Change-Id: I2735a6190ec546aee7329f3a52ada4da06befb76