Use byte count rather than string length for NMS component name check Bug: 505067993 Test: atest NotificationManagerServiceTest Flag: EXEMPT BUGFIX Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:e844e46351d53ae6f8fb8d35dbfeb0677dc0dbf1 Merged-In: Ie1bf232340770e1237f80177bb0b86eabeda3635 Change-Id: Ie1bf232340770e1237f80177bb0b86eabeda3635