Ensure "AppIconSelector" does not match folders.

Not sure if this is considered brittle, but at this moment, the
BubbleTextView used for folder labels is not focusable, while the
one used for app labels is focusable.

Also add package name to the context logs to help debug similar
test failures in the future.

Fix: 319194153
Test: atest android.platform.test.scenario.google.OpenAppMicrobenchmark$1#testOpen
Flag: NA
Change-Id: Ibf88afdd6d3ef03b75ea44910b485e7e74e348b0