Ensuring valid packageName when granting slice permission

Bug: 401256328
Test: atest SliceManagerTest
Flag: EXEMPT bugfix
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:53c79b8cd60ff42717f9da3f85b5a576c1d56833)
Merged-In: I8e28097c0570922d9fb9ec9588b45bf4361a5020
Change-Id: I8e28097c0570922d9fb9ec9588b45bf4361a5020
1 file changed