Clean up bubble text view test so that the feature flag is off at the end

- When running the test with feature flag is on, the TestLauncherApp is unable to be found when rerunning the failed TaplTests the bug states. I suspect this because the BubbleTextViewTest.java test is not properly torn down in the test environment which seems to be the case.

bug: 272798314
bug: 272797678
test: locally - able to repro when two line is on
Change-Id: I7379a5411de70f24804b404dbe5c7cf7f6769977