Merge "Use operator<< with String16 rather than char16_t*" into main am: 8d3b50ebb5

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2898895

Change-Id: I2da439e1ede129d6a66665e68d6dc24efeaad58e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>