Minor Input:inhibitInput followup to #9065 (#9139)

* GestureDetector: Downgrade probeClockSource log messages to debug

We're seeing a bit more of 'em between autostandby and inhibitInput now,
and the whole thing was implemented long enough ago that it's no longer
critical to see this in random non-debug logs ;).

* Input: Reset gesture state in inhibitInput

Should prevent bogus gestures when re-enabling the handlers if we were
called in the middle of gesture detection.

frontend/device/input.lua

@@ -1310,6 +1310,9 @@ function Input:inhibitInput(toggle)
             self._generic_ev_handler = self.handleGenericEv
             self.handleGenericEv = self.voidEv
         end
+
+        -- Reset gesture detection state to a blank slate, to avoid bogus gesture detection on restore.
+        self:resetState()
     else
         -- Restore event handlers, if any
         if self._key_ev_handler then