Launcher dump proto that will be used for:

$ adb shell dumpsys activity provider com.android.launcher3/com.android.launcher3.LauncherProvider
To see how the proto is filled: go/launcher-proto-dump

b/31772480

Change-Id: I8e0f1e5e38148a3dfeabd2fc057392193b2625dd
(cherry picked from commit 6aa3729e)