[pm/metrics] do not log package name for adb installations

Per privacy requirements, we will not log package name if the
installation is initiated from adb.

Test: manual with adb install
Test: $ ./out/host/linux-x86/bin/statsd_testdrive 263
event_metrics {
  data {
    elapsed_timestamp_nanos: 630320497997
    atom {
      package_installer_v2_reported {
        is_incremental: true
        package_name: ""
        duration_millis: 567
        return_code: 1
      }
    }
  }
}

BUG: 152913040
Change-Id: I147358e59bf6a43fc76b6721ec1a415167b305d7

services/core/java/com/android/server/pm/PackageInstallerSession.java

@@ -1801,11 +1801,16 @@ public class PackageInstallerSession extends IPackageInstallerSession.Stub {
         }
     }
 
-    private void logDataLoaderInstallationSession(int returnCode, String extraMessage) {
+    private void logDataLoaderInstallationSession(int returnCode) {
+        // Skip logging the side-loaded app installations, as those are private and aren't reported
+        // anywhere; app stores already have a record of the installation and that's why reporting
+        // it here is fine
+        final String packageNameToLog =
+                (params.installFlags & PackageManager.INSTALL_FROM_ADB) == 0 ? mPackageName : "";
         final long currentTimestamp = System.currentTimeMillis();
         FrameworkStatsLog.write(FrameworkStatsLog.PACKAGE_INSTALLER_V2_REPORTED,
                 isIncrementalInstallation(),
-                mPackageName,
+                packageNameToLog,
                 currentTimestamp - createdMillis,
                 returnCode);
     }
@@ -2812,7 +2817,7 @@ public class PackageInstallerSession extends IPackageInstallerSession.Stub {
 
         mCallback.onSessionFinished(this, success);
         if (isDataLoaderInstallation()) {
-            logDataLoaderInstallationSession(returnCode, msg);
+            logDataLoaderInstallationSession(returnCode);
         }
     }