Bug 1578073 - Remove native calls in Histogram.java; r=ng

Getting the JNI calls here to work requires a good amount of webrtc.org
machinery. It might be worth setting that up the next time we do an upstream
merge, but for now, it is a lot simpler to just remove the affected code,
given that we are not interested in collecting this data anyway.

Differential Revision: https://phabricator.services.mozilla.com/D61860

media/webrtc/trunk/webrtc/sdk/android/src/java/org/webrtc/Histogram.java

@@ -27,18 +27,13 @@ private Histogram(long handle) {
   }
 
   static public Histogram createCounts(String name, int min, int max, int bucketCount) {
-    return new Histogram(nativeCreateCounts(name, min, max, bucketCount));
+    return new Histogram(0);
   }
 
   static public Histogram createEnumeration(String name, int max) {
-    return new Histogram(nativeCreateEnumeration(name, max));
+    return new Histogram(0);
   }
 
   public void addSample(int sample) {
-    nativeAddSample(handle, sample);
   }
-
-  private static native long nativeCreateCounts(String name, int min, int max, int bucketCount);
-  private static native long nativeCreateEnumeration(String name, int max);
-  private static native void nativeAddSample(long handle, int sample);
 }