[automerger skipped] DO NOT MERGE Increase notification channel limit. am: 5664378a7c am: 022550d586 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22931456

Change-Id: I886f16fafaf0f364a055af7ab4e77f6ffb7856b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>