Revert "remove qrngd"

This reverts commit ce926044eb04238b673b3447bc7a0ed9381852d1.

Change-Id: I6c24ba20fd1b17869f316937e062d01de2c3694a
Merge "Revert "remove qrngd"" into cm-11.0
Merge remote-tracking branch 'cm/cm-11.0' into kitkat