More memory updates

 - Some string changes
 - Make processes in memory details not clickable
 - Put processes in a 'detail' category
 - Hide processes when an app only has 1
 - Add memory item to bottom of app info page

Bug: 20694769
Change-Id: Ifbe2205aeef230e44752d075578524249b30bdf8
diff --git a/res/xml/installed_app_details.xml b/res/xml/installed_app_details.xml
index deab13b..470e292 100644
--- a/res/xml/installed_app_details.xml
+++ b/res/xml/installed_app_details.xml
@@ -51,4 +51,10 @@
         android:title="@string/power_usage_summary_title"
         android:selectable="true" />
 
+    <Preference
+        android:key="memory"
+        android:title="@string/memory_settings_title"
+        android:enabled="false"
+        android:selectable="true" />
+
 </PreferenceScreen>