Revert "Update PhoneStatusBar.java"

This reverts commit 55e7a6ba59b44e1c6238ad61346aa9f658b3eb82.
Revert "Add ContentLoadingProgressBar support"

This reverts commit c40ed9a7ceae8e7c06ef8cc86682b341924e28ef.
Revert "[1/2] SystemUI: Add time-context headers to the notification header"

This reverts commit dbc0fbb4b4a1130229cd99d50d8fac972ef146f3.