Merge "DSU service: Pipeline the installation task to improve performance" am: 309fad06

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2045078



Change-Id: Ia7622eb69de48d2ffccb189de6cf29d636057b31
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>