Merge \\\\\\\\\\\"DO NOT MERGE Add bound checks to utf16_to_utf8\\\\\\\\\\\"...

Merge \\\\\\\\\\\"DO NOT MERGE Add bound checks to utf16_to_utf8\\\\\\\\\\\" into lmp-dev am: 5f34f405  -s ours am: 20ae503b am: 012d1246 am: e6373adb  -s ours am: 9f51ebbc am: b47df5d9 am: bfd0b68b am: 6cf2cef9  -s ours am: 0c420366 am: 6bc1cb3d
am: a8ae6259  -s ours

Change-Id: Iac804b8dd1291ccb410bc32b8d0290164c013aa9