Insert a check that keyguard is invisible into waitForLauncherCondition

This will unify diagnostics because otherwise waitForLauncherCondition would fail with a different message if keyguard is present.

Test: presubmit
Bug: 187761685
Flag: N/A
Change-Id: I1a34b4c2ad859b87263733a8a65527b8357e1950
1 file changed