Merge "MediaMetrics: Cleanup the formatting of session ID" into sc-dev am: 138a3612a8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14934055

Change-Id: Id175ad1824294fc695d97180af1ec3031dab81a9

services/core/java/com/android/server/media/metrics/MediaMetricsManagerService.java

@@ -98,7 +98,8 @@ public final class MediaMetricsManagerService extends SystemService {
         private String getSessionIdInternal(int userId) {
             byte[] byteId = new byte[16]; // 128 bits
             mSecureRandom.nextBytes(byteId);
-            String id = Base64.encodeToString(byteId, Base64.DEFAULT);
+            String id = Base64.encodeToString(
+                    byteId, Base64.NO_PADDING | Base64.NO_WRAP | Base64.URL_SAFE);
             return id;
         }