Enable update_engine to access OTA package via file descriptor am: 500ca135b7 am: 7fe6befc0c am: 0b2c79d7d0 am: 27bf7744e4 Change-Id: Id98508109567539be3d561e1a98dd91ec8e0011e GitOrigin-RevId: a88b11f541f78d26fb64e0ad57ce6bd8273acbd4