Avoid empty token when show popuwindow

This is an AOSP design flaw. When showing popuwindow, if the token
is null, it will cause the app to crash.

if token is null, return directly.

Bug: 361270046
Test: run MTBF Test Pass

Change-Id: I61fa69799d2948fe22178bbf761c63667f736f69
Signed-off-by: Jis G Jacob <studiokeys@blissroms.org>
1 file changed