Merge "Throttle package session async write requests" into sc-dev am: a7c3e113 am: 7a895ad5 am: f3a9e909

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13780279

Change-Id: I9513209fb9009c65b859cc5aee03e5ab6b841ce0