[automerger] String16: remove integer overflows am: d0648d8d am: 9de539d0...

[automerger] String16: remove integer overflows am: d0648d8d am: 9de539d0 am: 726007ed am: 4ca82d1d am: 35629db6 am: dc2153c9 am: f479f906 am: e9df4d52 am: dd95a7f1
am: f546acd3  -s ours

Change-Id: I00bb77d99b2e4548215a64a80d89c214b0759c10