[automerger] libbinder: readCString: no ubsan sub-overflow am: d0d4b584fc am: a7134ad559 am: 7e71b6ee21 am: 2537a8b5b6 am: 85c1e41520 am: 6658f2faec am: a9d88cd608 am: 9d5523b8f5 am: cf43794b93
am: c838b5ddfd

Change-Id: Ia457c215b826e0cc73bf127ba4e3cf2c200b0467