Add initial split from GroupedTaskView animation

* Created SplitAnimationController to prevent more
RecentsView bloat
* Extract SplitSelectSource attributes into separate class
* http://recall/-/cMb5xTTxhmZtFt04eYnmQj/eACJq1un8Ef91LgmQblpAw

Bug: 267370106
Change-Id: I5d430c091ac84bbbc30319e7b78711b610a21252

quickstep/src/com/android/quickstep/util/SplitSelectStateController.java

@@ -82,6 +82,7 @@ public class SplitSelectStateController {
     private final Context mContext;
     private final Handler mHandler;
     private final RecentsModel mRecentTasksModel;
+    private final SplitAnimationController mSplitAnimationController;
     private StatsLogManager mStatsLogManager;
     private final SystemUiProxy mSystemUiProxy;
     private final StateManager mStateManager;
@@ -96,6 +97,11 @@ public class SplitSelectStateController {
     private boolean mRecentsAnimationRunning;
     /** If {@code true}, animates the existing task view split placeholder view */
     private boolean mAnimateCurrentTaskDismissal;
+    /**
+     * Acts as a subset of {@link #mAnimateCurrentTaskDismissal}, we can't be dismissing from a
+     * split pair task view without wanting to animate current task dismissal overall
+     */
+    private boolean mDismissingFromSplitPair;
     @Nullable
     private UserHandle mUser;
     /** If not null, this is the TaskView we want to launch from */
@@ -116,6 +122,7 @@ public class SplitSelectStateController {
         mStateManager = stateManager;
         mDepthController = depthController;
         mRecentTasksModel = recentsModel;
+        mSplitAnimationController = new SplitAnimationController(this);
     }
 
     /**
@@ -399,6 +406,18 @@ public class SplitSelectStateController {
         mAnimateCurrentTaskDismissal = animateCurrentTaskDismissal;
     }
 
+    public boolean isDismissingFromSplitPair() {
+        return mDismissingFromSplitPair;
+    }
+
+    public void setDismissingFromSplitPair(boolean dismissingFromSplitPair) {
+        mDismissingFromSplitPair = dismissingFromSplitPair;
+    }
+
+    public SplitAnimationController getSplitAnimationController() {
+        return mSplitAnimationController;
+    }
+
     /**
      * Requires Shell Transitions
      */
@@ -506,6 +525,7 @@ public class SplitSelectStateController {
         mItemInfo = null;
         mSplitEvent = null;
         mAnimateCurrentTaskDismissal = false;
+        mDismissingFromSplitPair = false;
     }
 
     /**
@@ -532,6 +552,10 @@ public class SplitSelectStateController {
         return mInitialTaskId;
     }
 
+    public int getSecondTaskId() {
+        return mSecondTaskId;
+    }
+
     private boolean isSecondTaskIntentSet() {
         return (mSecondTaskId != INVALID_TASK_ID || mSecondTaskIntent != null);
     }