GN: Add dependency libjingle_peerconnection_java to modules_unittests.
GN: Add dependency libjingle_peerconnection_java to modules_unittests.

This change only affects the Android build.

BUG=webrtc:6189
TBR=tommi@webrtc.org
NOTRY=True

Review-Url: https://codereview.webrtc.org/2233903002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#13722}

TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc