Allow test emergency call to remove all radio off reasons.

Bug: 189365436
Test: Register mock number with
https://sites.google.com/a/google.com/android-telecom/testing/test-emergency-call,
trigger radio off thermal mitigation with
https://docs.google.com/document/d/1mRsIPGdb-zajRhCJm5N1jEKtwZ0yMcQzVST4p0Afj7c/edit?resourcekey=0-AtIFNnN8wNLBkrBYkkWbgg#,
then try ot place voice call. atest FrameworksTelephonyTests

Change-Id: I92cf8c8eeff2d44efffadfa9144342af0d6828dd
Merged-In: I92cf8c8eeff2d44efffadfa9144342af0d6828dd