Update tests for ENABLE_TWOLINE_ALLAPPS and ENABLE_TWOLINE_DEVICESEARCH

PM said we can enable ENABLE_TWOLINE_ALLAPPS and ENABLE_TWOLINE_DEVICESEARCH flags.

Since I am enabling two-line text for all apps, it's possible that the text would have other texts within the app name itself. For example, if a title of an app is long for example "Amazon Shopping" the title can now be like "Amazon\nShopping". For tests to recognize its "Amazon shopping", I am resorting to identifying the app title based on the content description.

Turn on the two feature flags in another CL

bug: 287307252
test: manual
Change-Id: I8bdc3db710514c9098ccb5d9781a100ac9b35eab