fix some rtl warnings

src/main/res/layout-land/account_setup.xml

@@ -145,6 +145,7 @@
 					android:layout_height="wrap_content"
 					android:layout_marginBottom="@dimen/alternate_half_margin"
 					android:drawableLeft="@android:drawable/stat_notify_sync"
+					android:drawableStart="@android:drawable/stat_notify_sync"
 					android:drawablePadding="@dimen/alternate_half_padding"
 					android:gravity="center_vertical"
 					android:textColor="@color/login_text_color"
@@ -220,8 +221,7 @@
 					android:hint="@string/auth_username"
 					android:inputType="textNoSuggestions"
 					android:textColor="@color/login_text_color"
-					android:textColorHint="@color/login_text_hint_color"
-					android:contentDescription="@string/auth_username"/>
+					android:textColorHint="@color/login_text_hint_color"/>
 
                 </android.support.design.widget.TextInputLayout>
 
@@ -253,6 +253,7 @@
 					android:gravity="center_vertical"
 					android:text="@string/auth_unauthorized"
 					android:drawableLeft="@android:drawable/stat_notify_sync"
+					android:drawableStart="@android:drawable/stat_notify_sync"
 					android:drawablePadding="@dimen/alternate_half_padding"
 					android:textColor="@color/login_text_color"
                     android:contentDescription="@string/auth_unauthorized"

src/main/res/layout/account_setup.xml

@@ -137,6 +137,7 @@
             android:layout_height="wrap_content"
             android:layout_marginBottom="@dimen/alternate_margin"
             android:drawableLeft="@android:drawable/stat_notify_sync"
+            android:drawableStart="@android:drawable/stat_notify_sync"
             android:drawablePadding="@dimen/alternate_half_padding"
             android:gravity="center_vertical"
             android:textColor="@color/login_text_color"
@@ -206,7 +207,6 @@
                 android:id="@+id/account_username"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:contentDescription="@string/auth_username"
                 android:ems="10"
                 android:hint="@string/auth_username"
                 android:inputType="textNoSuggestions"
@@ -227,7 +227,6 @@
                 android:id="@+id/account_password"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:contentDescription="@string/auth_password"
                 android:drawablePadding="@dimen/alternate_half_padding"
                 android:ems="10"
                 android:hint="@string/auth_password"
@@ -243,6 +242,7 @@
             android:layout_height="wrap_content"
             android:layout_marginBottom="@dimen/alternate_margin"
             android:drawableLeft="@android:drawable/stat_notify_sync"
+            android:drawableStart="@android:drawable/stat_notify_sync"
             android:drawablePadding="@dimen/alternate_half_padding"
             android:gravity="center_vertical"
             android:text="@string/auth_unauthorized"