Handling exception when per-use prompt cannot be generated

Add handling corner cases when the system fails to generate per-use prompt for
device log access. This change addresses when the passed package name is
null or the application info cannot be found.

Bug: 228053177
Test: CtsVerifier
Ignore-AOSP-First: pending fix for logcat privacy issue
Change-Id: I03058599332108821d461bbe38072a23bae2ed3c