[DO NOT MERGE] Revert submission 9950791-pick-precise-dataconn

Reason for revert: Droidcop-triggered revert due to breakage https://android-build.googleplex.com/builds/quarterdeck?branch=git_qt-qpr1-dev-plus-aosp&target=aosp_cf_x86_phone-userdebug&lkgb=6087936&lkbb=6087980&fkbb=6087980, b/146588413
Reverted Changes:
I8445808a0: Expose PreciseDataConnectionState to Public API
Ib6a769f5a: Expose PreciseDataConnectionState to Public API

Note: these CLs are correctly merged already in master and do not need to be reverted there.

Change-Id: I102a8b8f69501bc1bcbcc3be69919d4b188b01d3