Make ProxyManager calls loggable on debug builds

This copies some existing classes like AccessibilityCache(ag/6154093)
and TouchExplorer and should make it easier to debug problems our
clients encounter.

Test: manual, "adb shell setprop log.tag.ProxyManager D" and restart
Bug: 229123285

Change-Id: I853c08bb5c807797a7983291bcec775129a96484
1 file changed