Add equals and hashCode method for IceCandidate class.

Bug: webrtc:11072
Change-Id: I03568c3290a49466d0f459b1de8c89afaaf020ba
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158860
Commit-Queue: Honghai Zhang <honghaiz@webrtc.org>
Reviewed-by: Alex Glaznev <glaznev@webrtc.org>
Reviewed-by: Tommi <tommi@webrtc.org>
Reviewed-by: Qingsi Wang <qingsi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29695}
diff --git a/BUILD.gn b/BUILD.gn
index 5cef130..73569c5 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -680,6 +680,7 @@
         "sdk/android/tests/src/org/webrtc/FakeMediaCodecWrapper.java",
         "sdk/android/tests/src/org/webrtc/GlGenericDrawerTest.java",
         "sdk/android/tests/src/org/webrtc/HardwareVideoEncoderTest.java",
+        "sdk/android/tests/src/org/webrtc/IceCandidateTest.java",
         "sdk/android/tests/src/org/webrtc/ScalingSettingsTest.java",
         "sdk/android/tests/src/org/webrtc/CryptoOptionsTest.java",
       ]