renamed button in recording dialog to 'attach'

src/main/res/layout/activity_recording.xml

@@ -33,7 +33,7 @@
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
-                android:text="@string/share"/>
+                android:text="@string/attach"/>
         </LinearLayout>
 
         <TextView

src/main/res/values/strings.xml

@@ -856,4 +856,5 @@
     <string name="manage_permission">Manage privileges</string>
     <string name="search_participants">Search participants</string>
     <string name="file_too_large">File too large</string>
+    <string name="attach">Attach</string>
 </resources>