add content description and rtl fixes

src/main/res/layout/contactlist_fragment.xml

@@ -46,7 +46,8 @@
             <ImageView
                 android:layout_width="match_parent"
                 android:layout_height="1dp"
-                android:src="@drawable/uploader_list_separator" />
+                android:src="@drawable/uploader_list_separator"
+                android:contentDescription="@null"/>
 
             <android.support.v7.widget.AppCompatButton
                 android:id="@+id/contactlist_restore_selected"

src/main/res/layout/drawer_header.xml

@@ -72,7 +72,7 @@
             >
 
             <LinearLayout
-                android:layout_width="@dimen/zero"
+                android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center_vertical"
                 android:layout_weight="1"

src/main/res/layout/file_details_fragment.xml

@@ -167,7 +167,10 @@
 				android:layout_height="wrap_content"
 				android:layout_gravity="start"
 				android:text="@string/favorite"
-				android:textSize="16sp"/>
+				android:textSize="16sp"
+				android:layout_alignParentTop="true"
+				android:layout_alignParentLeft="true"
+				android:layout_alignParentStart="true"/>
 
 			<LinearLayout
 				android:layout_width="match_parent"
@@ -206,7 +209,8 @@
 						android:layout_height="wrap_content"
 						android:layout_marginLeft="@dimen/standard_half_margin"
 						android:background="@android:color/transparent"
-						android:src="@drawable/ic_cancel"/>
+						android:src="@drawable/ic_cancel"
+						android:contentDescription="@string/common_cancel"/>
 
 				</LinearLayout>
 

src/main/res/layout/file_download_fragment.xml

@@ -42,27 +42,25 @@
 		android:gravity="center"
 		android:layout_marginTop="@dimen/fragment_margin"
 		android:layout_marginBottom="@dimen/alternate_fragment_margin"
-		android:orientation="horizontal"
-		>
+		android:orientation="horizontal">
 	    				
 		<ProgressBar android:id="@+id/progressBar"
-			android:layout_width="@dimen/zero"
+			android:layout_width="0dp"
 			android:layout_height="wrap_content"
 			android:layout_weight="1"
 			style="?android:attr/progressBarStyleHorizontal"
 			android:indeterminate="false"
-			android:indeterminateOnly="false"
-
-			/>
+			android:indeterminateOnly="false"/>
 
 		<ImageButton
 			android:id="@+id/cancelBtn"
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
 			android:layout_marginLeft="@dimen/fragment_margin"
+			android:layout_marginStart="@dimen/fragment_margin"
 			android:src="@drawable/ic_action_cancel_grey"
 			android:background="@android:color/transparent"
-		/>
+			android:contentDescription="@string/common_cancel"/>
 
 	</LinearLayout>
 			

src/main/res/layout/files_folder_picker.xml

@@ -26,7 +26,7 @@
 
 	<FrameLayout 
 		android:layout_width="match_parent"
-		android:layout_height="@dimen/zero"
+		android:layout_height="0dp"
         android:layout_weight="1"
 		android:id="@+id/fragment_container" />
 
@@ -38,7 +38,8 @@
 		<ImageView
 			android:layout_width="match_parent"
 			android:layout_height="1dp"
-			android:src="@drawable/uploader_list_separator"/>
+			android:src="@drawable/uploader_list_separator"
+			android:contentDescription="@null"/>
 
 	</LinearLayout>
 	

src/main/res/layout/grid_sync_item.xml

@@ -39,7 +39,8 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:background="#99000000"
-        android:scaleType="centerCrop"/>
+        android:scaleType="centerCrop"
+        android:contentDescription="@null"/>
 
     <LinearLayout
         android:id="@+id/counterLayout"

src/main/res/layout/share_user_item.xml

@@ -34,7 +34,7 @@
             android:layout_gravity="center_vertical"/>
 
         <TextView
-            android:layout_width="match_parent"
+            android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:textSize="@dimen/two_line_primary_text_size"
@@ -43,6 +43,7 @@
             android:layout_marginTop="@dimen/standard_half_margin"
             android:layout_marginBottom="@dimen/standard_half_margin"
             android:layout_marginLeft="@dimen/standard_half_margin"
+            android:layout_marginStart="@dimen/standard_half_margin"
             android:textColor="@color/textColor"
             android:singleLine="true"
             android:ellipsize="middle"
@@ -54,7 +55,8 @@
             android:id="@+id/unshareButton"
             android:src="@drawable/ic_action_delete_grey"
             android:layout_gravity="center_vertical"
-            android:padding="@dimen/standard_half_padding"/>
+            android:padding="@dimen/standard_half_padding"
+            android:contentDescription="@string/common_delete"/>
 
         <ImageView
             android:layout_width="wrap_content"