Merge "Validate URI-based shortcut icon at creation time." into rvc-dev am: bdcf6b3c0f am: bf3e2fd99a am: 37fbb483b2 am: ac61b7d030 am: f9a2bcf245

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24046929

Change-Id: I6ddacb513ad4c86787d7ae56012808aabdd3cf07
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>