Prevent getting data from Clipboard if device is locked

Clipboard should not return data if the device is locked. This CL checks
for device locked state before returning values from get/has functions.

Bug: 64934810
Change-Id: I856a9079fe64db0af44383fae1a9a418de959420
Merged-In: Icefac226615fe22a7735dff4ba4c3b528fb2ac12
1 file changed