Revert "Fall back to SCO connection if eSCO connection is failed"

This reverts commit 917671e0.

Reason for revert: https://b.corp.google.com/issues/303168931#comment31

Bug: 303168931
Flag: EXEMPT revert
Test: m com.android.btservices
Change-Id: If9db1dd94f7a87c2e12f4dc95dbe7cf874aa58c0