Implement equals() and hashCode() for VideoCodecInfo.

To be able to compare VideoCodecInfos in a nice way in Java and still
use the correct criteria for comparing H264 codec infos.

A similar thing was done for Obj-C here:
https://webrtc-review.googlesource.com/c/src/+/4383

Bug: webrtc:7925
Change-Id: I43f532d4efa557fc8fe25a82eebc35072b91e6db
Reviewed-on: https://webrtc-review.googlesource.com/23240
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Commit-Queue: Anders Carlsson <andersc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20716}

sdk/android/api/org/webrtc/HardwareVideoEncoderFactory.java

@@ -93,6 +93,16 @@ public class HardwareVideoEncoderFactory implements VideoEncoderFactory {
     Integer yuvColorFormat = MediaCodecUtils.selectColorFormat(
         MediaCodecUtils.ENCODER_COLOR_FORMATS, info.getCapabilitiesForType(mime));
 
+    if (type == VideoCodecType.H264) {
+      boolean isHighProfile = isSameH264Profile(input.params, getCodecProperties(type, true))
+          && isH264HighProfileSupported(info);
+      boolean isBaselineProfile = isSameH264Profile(input.params, getCodecProperties(type, false));
+
+      if (!isHighProfile && !isBaselineProfile) {
+        return null;
+      }
+    }
+
     return new HardwareVideoEncoder(codecName, type, surfaceColorFormat, yuvColorFormat,
         input.params, getKeyFrameIntervalSec(type), getForcedKeyFrameIntervalMs(type, codecName),
         createBitrateAdjuster(type, codecName), sharedContext);
@@ -269,4 +279,7 @@ public class HardwareVideoEncoderFactory implements VideoEncoderFactory {
         throw new IllegalArgumentException("Unsupported codec: " + type);
     }
   }
+
+  private static native boolean isSameH264Profile(
+      Map<String, String> params1, Map<String, String> params2);
 }