Do not initialize internal tracer if it has already been initialized.

Bug: b/68989834
Change-Id: I7bb02d58cef5c14c6433d1fc7a95b46ff2b27f6f
Reviewed-on: https://webrtc-review.googlesource.com/23280
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20696}
diff --git a/sdk/android/BUILD.gn b/sdk/android/BUILD.gn
index e1c4df2..b3a7894 100644
--- a/sdk/android/BUILD.gn
+++ b/sdk/android/BUILD.gn
@@ -568,6 +568,7 @@
       "instrumentationtests/src/org/webrtc/HardwareVideoEncoderTest.java",
       "instrumentationtests/src/org/webrtc/MediaCodecVideoEncoderTest.java",
       "instrumentationtests/src/org/webrtc/NetworkMonitorTest.java",
+      "instrumentationtests/src/org/webrtc/PeerConnectionFactoryTest.java",
       "instrumentationtests/src/org/webrtc/PeerConnectionTest.java",
       "instrumentationtests/src/org/webrtc/RendererCommonTest.java",
       "instrumentationtests/src/org/webrtc/SurfaceTextureHelperTest.java",