Added code to log the current value of the "allow unknown sources" setting after

successful package installation.

Change-Id: Id8de7ae94e3b3b68e033c24649ca67324d894ce8

services/java/com/android/server/EventLogTags.logtags

@@ -114,6 +114,8 @@ option java_package com.android.server
 # Package Manager ready:
 3100 boot_progress_pms_ready (time|2|3)
 # + check activity_launch_time for Home app
+# Value of "unknown sources" setting at app install time
+3110 unknown_sources_enabled (value|1)
 
 
 # ---------------------------

services/java/com/android/server/pm/PackageManagerService.java

@@ -688,6 +688,10 @@ public class PackageManagerService extends IPackageManager.Stub {
                                 // Remove the replaced package's older resources safely now
                                 deleteOld = true;
                             }
+
+                            // Log current value of "unknown sources" setting
+                            EventLog.writeEvent(EventLogTags.UNKNOWN_SOURCES_ENABLED,
+                                getUnknownSourcesSettings());
                         }
                         // Force a gc to clear up things
                         Runtime.getRuntime().gc();
@@ -5407,6 +5411,17 @@ public class PackageManagerService extends IPackageManager.Stub {
                 DEFAULT_VERIFY_ENABLE ? 1 : 0) == 1 ? true : false;
     }
 
+    /**
+     * Get the "allow unknown sources" setting.
+     *
+     * @return the current "allow unknown sources" setting
+     */
+    private int getUnknownSourcesSettings() {
+        return android.provider.Settings.Secure.getInt(mContext.getContentResolver(),
+                android.provider.Settings.Secure.INSTALL_NON_MARKET_APPS,
+                -1);
+    }
+
     public void setInstallerPackageName(String targetPackage, String installerPackageName) {
         final int uid = Binder.getCallingUid();
         // writer