Moving SysUI with legacy Recents to another build target

- Move all legacy recents code out of the core sysui code
- Add separate target for products which still depend on it
- Move overview proxy implementation into another implementation of the
  recents interface

Test: atest SystemUITests
Test: Push SystemUiWithLegacyRecents to the system image
      adb shell pm disable com.google.android.apps.nexuslauncher/com.android.quickstep.TouchInteractionService
      and ensure that the old recents implementation still works (and split
      screen)

Change-Id: Iad67218ec37c13c79b6393d87f6bdc4f3996e2c6
Signed-off-by: Winson Chung <winsonc@google.com>
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickStepController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickStepController.java
index fd5403f..3980126 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickStepController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickStepController.java
@@ -20,8 +20,8 @@
 import static android.view.WindowManagerPolicyConstants.NAV_BAR_LEFT;
 import static com.android.systemui.Interpolators.ALPHA_IN;
 import static com.android.systemui.Interpolators.ALPHA_OUT;
-import static com.android.systemui.OverviewProxyService.DEBUG_OVERVIEW_PROXY;
-import static com.android.systemui.OverviewProxyService.TAG_OPS;
+import static com.android.systemui.recents.OverviewProxyService.DEBUG_OVERVIEW_PROXY;
+import static com.android.systemui.recents.OverviewProxyService.TAG_OPS;
 import static com.android.systemui.shared.system.NavigationBarCompat.HIT_TARGET_DEAD_ZONE;
 import static com.android.systemui.shared.system.NavigationBarCompat.HIT_TARGET_HOME;
 
@@ -56,7 +56,7 @@
 import android.view.WindowManagerGlobal;
 import com.android.systemui.Dependency;
 import com.android.systemui.Interpolators;
-import com.android.systemui.OverviewProxyService;
+import com.android.systemui.recents.OverviewProxyService;
 import com.android.systemui.R;
 import com.android.systemui.SysUiServiceProvider;
 import com.android.systemui.plugins.statusbar.phone.NavGesture.GestureHelper;