Renamed ZeroingEstimator to PotAndIndexPulseZeroingEstimator

Renamed to allow for creating a new interface named ZeroingEstimator
in the future.

Change-Id: I374808cdc39dd4141ea67c81de69bbac98326648
diff --git a/frc971/control_loops/profiled_subsystem.cc b/frc971/control_loops/profiled_subsystem.cc
index 1f1a76b..5a5d79d 100644
--- a/frc971/control_loops/profiled_subsystem.cc
+++ b/frc971/control_loops/profiled_subsystem.cc
@@ -15,7 +15,8 @@
 
 SingleDOFProfiledSubsystem::SingleDOFProfiledSubsystem(
     ::std::unique_ptr<SimpleCappedStateFeedbackLoop<3, 1, 1>> loop,
-    const ::frc971::constants::ZeroingConstants &zeroing_constants,
+    const ::frc971::constants::PotAndIndexPulseZeroingConstants &
+        zeroing_constants,
     const ::frc971::constants::Range &range, double default_velocity,
     double default_acceleration)
     : ProfiledSubsystem(::std::move(loop), {{zeroing_constants}}),