Merge "Update CPA startActivity javadoc to refer to passing the result back" into rvc-qpr-dev am: e9fd7678bf am: 73d6176569

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13144034

Change-Id: I058af3ded9d0a54d966682a7424fd69d832247ce