Renaming LauncherInstrumentation.pressHome to goHome

This is a better name now that we have gestural nav.

Renaming will happen in stages, the first one being having 2 names side-by-side.

Test: presubmit
Bug: 187761685
Change-Id: Ifb15c838cc0e161d852cf6df025687e3f92d6124

tests/src/com/android/launcher3/ui/widget/RequestPinItemTest.java

@@ -169,7 +169,7 @@ public class RequestPinItemTest extends AbstractLauncherUiTest {
         }
 
         // Go back to home
-        mLauncher.pressHome();
+        mLauncher.goHome();
         Wait.atMost("", new ItemSearchCondition(itemMatcher), DEFAULT_ACTIVITY_TIMEOUT,
                 mLauncher);
     }