Re-enable rampup_tests.cc for Android.
Re-enable rampup_tests.cc for Android.

BUG=3770
R=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/27499004

Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 541753f96c7f756cfab253e0be55b669360b8e91

sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc