Handle ProtoLog logging command in WMShell

Added a ProtoLogController class that hooks into ShellCommandHandler to
handle the adb shell command for ProtoLog in WMShell.

Removed the proxy in WM to pipe the adb shell command to WMShell via
StatusBarManagerService.

Bug: 243447162
Test: adb shell dumpsys activity service \
        SystemUIService WMShell protolog help
Change-Id: I9175ec88dcbae53508c97b4df1c2378b3eb9d648