[media] Use ArrayList in CodecProfileLevelList.

This fixes  JdkObsolete lint warnings in media_java.

Bug: NONE
Test: build media_java
Change-Id: I198be70370ed4b98336b3f858183c5d65555bc59
Reviewed-on: https://chromium-review.googlesource.com/827674Reviewed-by: Frank Liberato <liberato@chromium.org>
Commit-Queue: Simeon Anfinrud <sanfin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524268}

media/base/android/java/src/org/chromium/media/CodecProfileLevelList.java

@@ -10,7 +10,7 @@ import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.base.annotations.MainDex;
 
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 
 @JNINamespace("media")
@@ -21,7 +21,7 @@ class CodecProfileLevelList {
     private final List<CodecProfileLevelAdapter> mList;
 
     public CodecProfileLevelList() {
-        mList = new LinkedList<CodecProfileLevelAdapter>();
+        mList = new ArrayList<CodecProfileLevelAdapter>();
     }
 
     public boolean addCodecProfileLevel(String mime, CodecProfileLevel codecProfileLevel) {