Revert "[incremental/pm] LauncherApps APIs for loading state and progress"

This reverts commit 0173a44f3d9f40aca3f231d6d4aea8999574851d.

Bug: 170959052
Test: Locally confirmed two reverts together fix app tray
Change-Id: I2f7b198f77b54be671c7f02bc2b67838bf99d28b
13 files changed