NPE Check for invalid regFailed or barringInfo ind

Add checks to prevent a crash in case the HAL sends
invalid indications to Android for registration
failure or barring info.

Bug: 156798092
Test: compilation
Merged-In: I9cbdd4777020d24e43576515bf5ca5dcc07c6d2d
Change-Id: I9cbdd4777020d24e43576515bf5ca5dcc07c6d2d
(cherry picked from commit 3838b783)