[RESTRICT AUTOMERGE] Check whether installerPackageName contains only valid characters am: e05cf74c0c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/28350797

Change-Id: I2a848d03cbc1ba03daa6a06ce6073e8fbf63d713
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>