Fix the header can't be scrolling problem in landscape mode

- Settings header is restricted scrolling by this ag/15029686
- To void some pages can't show the contain part while heading unscrolling.
  We allow the header can be scrolling in the landscape mode.

Fixes: 207353353
Test: make RunSettingsRoboTests -j
Change-Id: Ice97c6244716d4768167feb78588807d13b06a94

src/com/android/settings/core/SettingsBaseActivity.java

@@ -22,6 +22,7 @@ import android.app.ActivityManager;
 import android.content.ComponentName;
 import android.content.Intent;
 import android.content.pm.PackageManager;
+import android.content.res.Configuration;
 import android.content.res.TypedArray;
 import android.graphics.text.LineBreakConfig;
 import android.os.Bundle;
@@ -117,7 +118,7 @@ public class SettingsBaseActivity extends FragmentActivity implements CategoryHa
                                                 LineBreakConfig.LINE_BREAK_WORD_STYLE_PHRASE)
                                         .build()));
             }
-            disableCollapsingToolbarLayoutScrollingBehavior();
+            autoSetCollapsingToolbarLayoutScrolling();
         } else {
             super.setContentView(R.layout.settings_base_layout);
         }
@@ -252,7 +253,7 @@ public class SettingsBaseActivity extends FragmentActivity implements CategoryHa
         return false;
     }
 
-    private void disableCollapsingToolbarLayoutScrollingBehavior() {
+    private void autoSetCollapsingToolbarLayoutScrolling() {
         if (mAppBarLayout == null) {
             return;
         }
@@ -263,7 +264,9 @@ public class SettingsBaseActivity extends FragmentActivity implements CategoryHa
                 new AppBarLayout.Behavior.DragCallback() {
                     @Override
                     public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
-                        return false;
+                        // Header can be scrolling while device in landscape mode.
+                        return appBarLayout.getResources().getConfiguration().orientation
+                                == Configuration.ORIENTATION_LANDSCAPE;
                     }
                 });
         params.setBehavior(behavior);