Move CronetInTetheringApexDefaults to //external/cronet

The JNI libs that this target depends on are going to be shimmed on top
of ToT and Stable Cronet. This reduces the number of cross-repo dependencies, making that change simpler (see http://aosp/3507996).

Test: m
Bug: b:396593141
Change-Id: I5e8ab89ea0ebe6a82f006568f30961dcf2f0603e
1 file changed