Merge "Optimize AttributionSource tokens - base" into sc-dev am: 2b90cc82 am: c4fe42e3 am: 85fce2dc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15247205

Change-Id: I6dacb049c5ea7dab25253ff3dff6fdfe79b31fdd