No Bug - Guard PJS tests to only apply to Nightly. (a=test-only)
Bug 874073 - Re-enable the 852293.html test and disable the real culprit, 802902.html.  r=ryanvm
Bug 901706: update IPeerConnectionObserver UUID r=ekr
Bug 901707: update IPeerConnection UUID r=ekr
Backed out changeset a4dd0dc4e354 (bug 824652) for Android M1 orange.