Revert "blue: hack around RIL crashing when a call is sent"

This reverts commit 3f9a61864d83ed4eb049de874c6bdac7e53c9571.

Change-Id: I4b2bf13a9239a68c27997bfe5470be714782da7b
Merge "Revert "blue: hack around RIL crashing when a call is sent"" into android-4.4