Merge "Check for invalid (negative) string pool pos." into sc-dev am:...

Merge "Check for invalid (negative) string pool pos." into sc-dev am: 59bad728 am: dcbf0547 am: 5bebcafc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15390628

Change-Id: Ib3272ff1a808ab32ee2daf5669bd68670907a1c1