Fix InTouchMode is not consistent between WMS and InputFlinger

Use getInTouchMode/setInTouchMode to access InTouchMode in WMS.

Test: atest TouchModeFocusChangeTest
Bug: 148002313
Change-Id: Iebea007f638624706ed91b6c17dcc73506d779ac

services/core/java/com/android/server/wm/Session.java

@@ -238,16 +238,12 @@ class Session extends IWindowSession.Stub implements IBinder.DeathRecipient {
 
     @Override
     public void setInTouchMode(boolean mode) {
-        synchronized (mService.mGlobalLock) {
-            mService.mInTouchMode = mode;
-        }
+        mService.setInTouchMode(mode);
     }
 
     @Override
     public boolean getInTouchMode() {
-        synchronized (mService.mGlobalLock) {
-            return mService.mInTouchMode;
-        }
+        return mService.getInTouchMode();
     }
 
     @Override

services/core/java/com/android/server/wm/WindowManagerService.java

@@ -938,7 +938,7 @@ public class WindowManagerService extends IWindowManager.Stub
      * Whether the UI is currently running in touch mode (not showing
      * navigational focus because the user is directly pressing the screen).
      */
-    boolean mInTouchMode;
+    private boolean mInTouchMode;
 
     private ViewServer mViewServer;
     final ArrayList<WindowChangeListener> mWindowChangeListeners = new ArrayList<>();
@@ -3461,6 +3461,12 @@ public class WindowManagerService extends IWindowManager.Stub
         mInputManager.setInTouchMode(mode);
     }
 
+    boolean getInTouchMode() {
+        synchronized (mGlobalLock) {
+            return mInTouchMode;
+        }
+    }
+
     public void showEmulatorDisplayOverlayIfNeeded() {
         if (mContext.getResources().getBoolean(
                 com.android.internal.R.bool.config_windowEnableCircularEmulatorDisplayOverlay)