Remove redundant initializers from WebRTC Java code.

Removes redundant field initializers such as null, 0 and false.

Bug: webrtc:9742
Change-Id: I1e54f6c6000885cf95f7af8e2701875a78445497
Reviewed-on: https://webrtc-review.googlesource.com/99481
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24676}
diff --git a/sdk/android/api/org/webrtc/ScreenCapturerAndroid.java b/sdk/android/api/org/webrtc/ScreenCapturerAndroid.java
index a13f871..2528460 100644
--- a/sdk/android/api/org/webrtc/ScreenCapturerAndroid.java
+++ b/sdk/android/api/org/webrtc/ScreenCapturerAndroid.java
@@ -47,9 +47,9 @@
   @Nullable private VirtualDisplay virtualDisplay;
   @Nullable private SurfaceTextureHelper surfaceTextureHelper;
   @Nullable private CapturerObserver capturerObserver;
-  private long numCapturedFrames = 0;
+  private long numCapturedFrames;
   @Nullable private MediaProjection mediaProjection;
-  private boolean isDisposed = false;
+  private boolean isDisposed;
   @Nullable private MediaProjectionManager mediaProjectionManager;
 
   /**