Add new API to find total RAM.

Change-Id: Iad2dff3c44f471515f093e7f0d0d959528881ab9
diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index aa7de82..54ef724 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -5360,6 +5360,7 @@
         final long homeAppMem = mProcessList.getMemLevel(ProcessList.HOME_APP_ADJ);
         final long hiddenAppMem = mProcessList.getMemLevel(ProcessList.HIDDEN_APP_MIN_ADJ);
         outInfo.availMem = Process.getFreeMemory();
+        outInfo.totalMem = Process.getTotalMemory();
         outInfo.threshold = homeAppMem;
         outInfo.lowMemory = outInfo.availMem < (homeAppMem + ((hiddenAppMem-homeAppMem)/2));
         outInfo.hiddenAppThreshold = hiddenAppMem;