mmi2grpc: Don't reconnect phone on reset

This is a partial revert of d5a38c8d

We don't want and don't need to reconnect the phone on each reset.
Furthermore this is breaking execution of PTS-bot tests with
the error

Bug: 245578454
Test: Test: TreeHugger
Ignore-AOSP-First: Cherry-pick from aosp
Merged-In: Icf123f8a77cde4e6bc31a02a9582d3f1f63815ae
Change-Id: Icf123f8a77cde4e6bc31a02a9582d3f1f63815ae