Enabling testing with swipe-up gesture on Pixel2 devices

Both Pixel1s and 2s have swipe-for-recents disabled by default. To
enable testing this gesture, we simple enable it on Pixel2s (and up).

The change enables the gesture for all tests that use LauncherStrategy
and run against Pixel phones.

This list is long, and includes:
* platform_testing/tests/perf/PerfTransitionTest/src/com/android/apptransition/tests/AppTransitionTests.java
* platform_testing/tests/jank/UbSystemUiJankTests/src/android/platform/systemui/tests/jank/LauncherJankTests.java

Bug: 72967764
Test: atest google/perf/jank/SystemUI/UbSystemUIJankTests:android.platform.systemui.tests.jank.LauncherJankTests#testHomeScreenSwipe
Change-Id: I80e1b66c789e4b9f5fd3eb8fd341b060f6ddbae4