Use the screenshot theme on wmshell screenshot tests
* This ensures screenshots in the tests are taken with light & dark
theme
* Additionally, set a background color on the activity in our
user education test -- otherwise the colors in the education views
match the background of the activity and we miss the outline of
the arrow & rounded corners on the view
Flag: EXEMPT test change
Test: atest --request-upload-result WMShellRobolectricScreenshotTests:com.android.wm.shell.bubbles.BubbleEducationViewScreenshotTest
& inspect the screenshots in the uploaded result (ran on acloud device)
Bug: 375030558
Change-Id: Ide7eb87b8d05fb3b8930ec21644ca5429a41c34a
5 files changed
