Merge "Remove unused fields from ProcessObserver." into main am: 89258c7d25 am: 26b51dca2d

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2891794

Change-Id: I36bd3a34c3664fb6dac3f02a8cb8c4f9899d45dd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>