commit 805d804635d8fecaf81b406b08994869097836c4
author Austin Borger <borgera@google.com> Fri Apr 21 20:07:49 2023 -0700
committer Austin Borger <borgera@google.com> Mon May 08 16:28:36 2023 +0000
tree 5025c463c37b5777dd411efe1d59064b128321dd
parent c03813b78e59446cefb105933ecf1a64483e9aed

Camera / UidObserver: Add the ability to subscribe to specific UIDs

UidObserver sends updates about the state of all packages installed on
the system. In the case of the cameraserver, we only care about a
handful of them. The current status quo is to filter out these callbacks
but there is a significant IPC cost that is not addressed by that
approach.

This patch adds new entrypoints to ActivityManagerService to listen only
to specified UIDs. This set of uids can be updated dynamically.

Change-Id: I669f27b94fb691187bb77942f53ebc02cb90ace4
Bug: 274486653
Test: -- on physical device:
      -- testCamera2AccessCallbackInSplitMode x10
      -- ActivityManagerServiceTest
      -- ActivityManagerProcessStateTest
      -- ActivityManagerFgsBgStartTest
      -- UidObserverControllerTest
      -- Alternate focus in split screen between Camera2 + GCA x20
Ignore-AOSP: Soak time in U