Merge "Replace `toUppercase` with `uppercase`." into main am: 1ac57e1996

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Calendar/+/3440184

Change-Id: I6c2460b8ac12227caed2bd4530af22d242303f48
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>