Merge "Create a new Transaction to apply the edge extensions" into tm-dev

                t.addTransactionCommittedListener(Runnable::run, () -> {

                    final WindowAnimationSpec animationSpec = a.asWindowAnimationSpec();

                    final Transaction edgeExtensionCreationTransaction = new Transaction();

                    edgeExtendWindow(animationLeash,

                            animationSpec.getRootTaskBounds(), animationSpec.getAnimation(),

                            mFrameTransaction);

                            edgeExtensionCreationTransaction);

                    synchronized (mLock) {

                        // only run if animation is not yet canceled by this point

                        if (mPreProcessingAnimations.get(animationLeash) == runningAnim) {

                            // In the case the animation is cancelled, edge extensions are removed

                            // onAnimationLeashLost which is called before onAnimationCancelled.

                            // So we need to check if the edge extensions have already been removed

                            // or not, and if so we don't want to apply the transaction.

                            synchronized (mEdgeExtensionLock) {

                                if (!mEdgeExtensions.isEmpty()) {

                                    edgeExtensionCreationTransaction.apply();

                                }

                            }

                            mPreProcessingAnimations.remove(animationLeash);

                            mPendingAnimations.put(animationLeash, runningAnim);

                            if (!mAnimationStartDeferred) {