Android: Generate JNI code for remaining classes in sdk/android

Bug: webrtc:8278
Change-Id: I20a4388ab347d8745d0edde808f7a0b610f077f9
Reviewed-on: https://webrtc-review.googlesource.com/31484
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21227}
diff --git a/sdk/android/api/org/webrtc/Metrics.java b/sdk/android/api/org/webrtc/Metrics.java
index 010e839..1e18851 100644
--- a/sdk/android/api/org/webrtc/Metrics.java
+++ b/sdk/android/api/org/webrtc/Metrics.java
@@ -13,7 +13,7 @@
 import java.util.HashMap;
 import java.util.Map;
 
-// Java-side of androidmetrics_jni.cc.
+// Java-side of androidmetrics.cc
 //
 // Rtc histograms can be queried through the API, getAndReset().
 // The returned map holds the name of a histogram and its samples.