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:9581befdf4db092b4ac5500b5146906c5dbc568c Merged-In: Ie1bf232340770e1237f80177bb0b86eabeda3635 Change-Id: Ie1bf232340770e1237f80177bb0b86eabeda3635