Launch TestActivity in fullscreen in testNonImeFocusablePopupWindow_onTopOfIme

The test checks interaction between a non-ime-focusable PopupWindow
and IME. However, IME may not overlap the PopupWindow at all in
free-form window mode, then the test fails.

Bug: 240886131
Test: android.view.inputmethod.cts.KeyboardVisibilityControlTest
Change-Id: I1414a57f51d574bba24b830416efb39a056e66d7
Merged-In: I1414a57f51d574bba24b830416efb39a056e66d7
1 file changed