fix icons in import/export dialog

Closes #2574

//FREEBIE

res/layout/import_fragment.xml

@@ -31,7 +31,7 @@
             <ImageView android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginRight="10dip"
-                       android:src="?stock_sms"/>
+                       android:src="?import_sms"/>
 
             <LinearLayout android:orientation="vertical"
                           android:layout_width="wrap_content"

res/values/attrs.xml

@@ -62,7 +62,7 @@
     <attr name="import_export_item_background_color" format="reference|color" />
     <attr name="import_export_item_background_shadow_color" format="reference|color" />
     <attr name="import_export_item_card_background" format="reference" />
-    <attr name="stock_sms" format="reference" />
+    <attr name="import_sms" format="reference" />
     <attr name="encrypted_backup" format="reference" />
     <attr name="plaintext_backup" format="reference" />
 

res/values/themes.xml

@@ -72,9 +72,9 @@
         <item name="import_export_item_background_color">@color/import_export_item_background_light</item>
         <item name="import_export_item_background_shadow_color">@color/import_export_item_background_shadow_light</item>
         <item name="import_export_item_card_background">@drawable/clickable_card_light</item>
-        <item name="stock_sms">@drawable/stock_sms_light</item>
-        <item name="encrypted_backup">@drawable/encrypted_backup_light</item>
-        <item name="plaintext_backup">@drawable/plaintext_backup_light</item>
+        <item name="import_sms">@drawable/ic_message_black</item>
+        <item name="encrypted_backup">@drawable/ic_lock_light</item>
+        <item name="plaintext_backup">@drawable/ic_content_copy_light</item>
 
         <item name="menu_new_conversation_icon">@drawable/ic_add_white_24dp</item>
         <item name="menu_group_icon">@drawable/ic_group_white_24dp</item>
@@ -158,9 +158,9 @@
         <item name="import_export_item_background_color">@color/import_export_item_background_dark</item>
         <item name="import_export_item_background_shadow_color">@color/import_export_item_background_shadow_dark</item>
         <item name="import_export_item_card_background">@drawable/clickable_card_dark</item>
-        <item name="stock_sms">@drawable/stock_sms_dark</item>
-        <item name="encrypted_backup">@drawable/encrypted_backup_dark</item>
-        <item name="plaintext_backup">@drawable/plaintext_backup_dark</item>
+        <item name="import_sms">@drawable/ic_message_white</item>
+        <item name="encrypted_backup">@drawable/ic_lock_dark</item>
+        <item name="plaintext_backup">@drawable/ic_content_copy_dark</item>
 
         <item name="fab_color">@color/textsecure_primary_dark</item>
         <item name="actionbar_icon">@drawable/actionbar_icon_holo_dark</item>