fix https://github.com/vector-im/riot-android/issues/1093 [Crypto] Cannot decrypt attachments on Android 4.2.X
fix https://github.com/vector-im/riot-android/issues/1093
[Crypto] Cannot decrypt attachments on Android 4.2.X

vector-im/vector-android,vector-im/riot-android,riot-spanish/riot-android,riot-spanish/riot-android,vector-im/vector-android,vector-im/riot-android,vector-im/riot-android,vector-im/riot-android,vector-im/vector-android,vector-im/riot-android,vector-im/vector-android,riot-spanish/riot-android,riot-spanish/riot-android