add new default ringtone

Change-Id: I0924d5e12dca56c33f9bedc7921d8d97a7c17dd2

ring-android/app/src/main/res/layout/dialog_about.xml

@@ -28,6 +28,24 @@
             android:text="@string/credits_developer"
             android:textAppearance="?android:attr/textAppearanceSmall" />
 
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="5dp"
+            android:layout_marginRight="5dp"
+            android:layout_marginTop="5dp"
+            android:text="@string/ringtones_by"
+            android:textColor="@color/color_primary_dark"
+            android:textSize="18sp" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="5dp"
+            android:layout_marginLeft="5dp"
+            android:layout_marginRight="5dp"
+            android:text="@string/credits_ringtones"
+            android:textAppearance="?android:attr/textAppearanceSmall" />
 
 
     </LinearLayout>

ring-android/app/src/main/res/values/strings.xml

@@ -49,7 +49,9 @@ along with this program; if not, write to the Free Software
     <!-- About dialog -->
     <string name="developed_by">Developed by</string>
     <string name="designed_by">Designed by</string>
+    <string name="ringtones_by">Ringtones by</string>
     <string name="credits_developer" translatable="false">Adrien Béraud\nAlexandr Sergheev\nAlexandre Lision\nAlexandre Viau\nAline Bonnet\nAndreas Traczyk\nAnthony Léonard\nCyrille Béraud\nEdric Milaret\nÉloi Bail\nEmmanuel Lepage-Vallée\nFrédéric Guimont\nGuillaume Roguez\nHadrien De Sousa\nJulien Grossholtz\nKateryna Kostiuk\nLoïc Siret\nMarianne Forget\nMichel Schmit\nNicolas Jäger\nNicolas Reynaud\nOlivier Gregoire\nOlivier Soldano\nPatrick Keroulas\nPierre Duchemin\nPhilippe Gorley\nRomain Bertozzi\nSaher Azer\nSébastien Blin\nSeva Ivanov\nSilbino Gonçalves Matado\nSimon Désaulniers\nStepan Salenikovich\nSimon Zeni\nThibault Wittemberg</string>
+    <string name="credits_ringtones" translatable="false">Loïc Bogino</string>
 
     <!-- RingActivity -->
     <string name="title_activity_sflphone_home">Ring</string>