This is to make tests by composition instead of inheritance.
Bug: 324261526
Flag: EXEMPT test only
Test: All test using BaseLauncherActivityTest
Change-Id: I616207da890e1979480d1b748f69a9c27c53f9db
The test don't run yet in presubmit, first I will have the NexusLauncherE2ETests
target ready and then I will add it to the presubmit.
Bug: 324261526
Flag: EXEMPT test only
Test: atest NexusLauncherE2ETests
Change-Id: I4daa204ec735456c481b0682ca518da381af7bb7