[dw_logging] Use Uid of the base app instead of user id in
DESKTOP_MODE_SESSION_TASK_UPDATE logs.

Test: Tested locally that uid logged corresponds to the package name of
the top activity.
Bug: 358099125
Flag: EXEMPT bug fix

Change-Id: Iea56f990a2630e78c2571dbd2b6b686f18baae2d
4 files changed