Return a runtime error if decryption fails instead of asserting.
Return a runtime error if decryption fails instead of asserting.

Change-Id: Ibab7f2cae3ff7a2e19bc3f31005d5059775a664a

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base