Catch InvalidDisplayException

Catches the InvalidDisplayException that may
occur if the rear display provided to display
the educational dialog is unavailable. This is
going to stop the system from crashing and
affecting the device and causing cascading test
failures.

This will be followed up with additional logging
to help figuring out what is causing this issue in
more detail.

Flag: EXEMPT bugfix
Test: RearDisplayCoreStartableTest
Bug: 412027394
Change-Id: Ibfafdf6174c994b81a71089b18afb82d8f6a248d