Add logs for pressHome for isLauncherVisible

- Log isLauncherVisble right before the swipe gesture to see if it's a more accurate indicator compared to reading isLauncherVisble earlier

Bug: 193653850
Test: StartLauncherViaGestureTests#testStressPressHome
Change-Id: I4a8303a82f1106c0d1345f561ab469aa4ed59e51

tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java

@@ -735,6 +735,7 @@ public final class LauncherInstrumentation {
                     dumpViewHierarchy();
                     action = "swiping up to home";
 
+                    final boolean launcherIsVisible = isLauncherVisible();
                     swipeToState(
                             displaySize.x / 2, displaySize.y - 1,
                             displaySize.x / 2, 0,
@@ -742,6 +743,9 @@ public final class LauncherInstrumentation {
                             launcherWasVisible
                                     ? GestureScope.INSIDE_TO_OUTSIDE
                                     : GestureScope.OUTSIDE_WITH_PILFER);
+                    // b/193653850: launcherWasVisible is a flaky indicator.
+                    log("launcherWasVisible: " + launcherWasVisible + ", launcherIsVisible: "
+                            + launcherIsVisible);
                 }
             } else {
                 log("Hierarchy before clicking home:");