Update test activities with a non-default icon.

Check against default app icon in FolderIconLoadTest

Bug: 357441807
Bug: 369222239
Bug: 369240511
Flag: EXEMPT bc-triaged bugfix
Test: FolderIconLoadTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:65c1010029e65c7e3062fd5e1407fa53437ac417)
Merged-In: I0e224f5b8bf8c0a8c51d88abd7c562d8e1ff7a55
Change-Id: I0e224f5b8bf8c0a8c51d88abd7c562d8e1ff7a55