Suppress ErrorProne StringSplitter warnings

Bug: webrtc:8750
Change-Id: I1ff1bae680659f804c72eab5d14cf9c8c5046b90
Reviewed-on: https://webrtc-review.googlesource.com/39660
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21625}
diff --git a/sdk/android/api/org/webrtc/FileVideoCapturer.java b/sdk/android/api/org/webrtc/FileVideoCapturer.java
index 331f9a7..88a0d30 100644
--- a/sdk/android/api/org/webrtc/FileVideoCapturer.java
+++ b/sdk/android/api/org/webrtc/FileVideoCapturer.java
@@ -29,6 +29,7 @@
   /**
    * Read video data from file for the .y4m container.
    */
+  @SuppressWarnings("StringSplitter")
   private static class VideoReaderY4M implements VideoReader {
     private static final String TAG = "VideoReaderY4M";
     private static final String Y4M_FRAME_DELIMETER = "FRAME";