Set textColor value to textColorPrimary attribute to facilitate theme'ing

app/src/main/res/layout/contact_list_drawer_footer.xml

@@ -26,7 +26,7 @@
             android:layout_marginLeft="32dp"
             android:text="@string/preference_editor"
             android:textAppearance="?android:attr/textAppearanceMedium"
-            android:textColor="@android:color/black"
+            android:textColor="?android:attr/textColorPrimary"
 
             />
 
@@ -52,7 +52,7 @@
             android:layout_marginLeft="32dp"
             android:text="@string/preference_about"
             android:textAppearance="?android:attr/textAppearanceMedium"
-            android:textColor="@android:color/black" />
+            android:textColor="?android:attr/textColorPrimary" />
 
     </LinearLayout>
 
@@ -76,9 +76,9 @@
             android:layout_marginLeft="32dp"
             android:text="@string/exit"
             android:textAppearance="?android:attr/textAppearanceMedium"
-            android:textColor="@android:color/black" />
+            android:textColor="?android:attr/textColorPrimary" />
 
     </LinearLayout>
 
 
-</LinearLayout>
+</LinearLayout>
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