Fix non-collapsing layout when scrolled from horiz recyclerview

Fixes #7042
// FREEBIE

res/layout/recipient_preference_activity.xml

@@ -75,6 +75,7 @@
                       android:padding="16dp"
                       android:text="@string/recipient_preference_activity__shared_media"
                       android:visibility="gone"
+                      android:focusableInTouchMode="true"
                       style="?android:attr/preferenceCategoryStyle"
                       android:textColor="@color/textsecure_primary"/>
 

res/layout/recipient_preference_photo_rail.xml

@@ -8,6 +8,6 @@
             android:paddingLeft="16dp"
             android:paddingStart="16dp"
             android:clipToPadding="false"
-            android:nestedScrollingEnabled="true"
+            android:nestedScrollingEnabled="false"
             android:scrollbars="none"/>
 </merge>

src/org/thoughtcrime/securesms/components/ThreadPhotoRailView.java

@@ -51,7 +51,7 @@ public class ThreadPhotoRailView extends FrameLayout {
     this.recyclerView = ViewUtil.findById(this, R.id.photo_list);
     this.recyclerView.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));
     this.recyclerView.setItemAnimator(new DefaultItemAnimator());
-    this.recyclerView.setNestedScrollingEnabled(true);
+    this.recyclerView.setNestedScrollingEnabled(false);
   }
 
   public void setListener(@Nullable OnItemClickedListener listener) {