[automerger skipped] DO NOT MERGE Add cross-user check for getDefaultSmsPackage(). am: cf1bd25a am: 44e796e1 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14987465

Change-Id: Ie77b64c1f7f23624dcc22c944b5aed07b95f0010