gd: Re-introduce read remote supported features

This command is very similar to the remote extended
features for page 0 and can cause confusion.  Broke out
into its own code path for clarity

Bug: 185967523
Test: gd/cert/run
Tag: #refactor
BYPASS_LONG_LINES_REASON: Bluetooth likes 120 lines

Change-Id: I1a3d841d811b47c928521ac3422c13c0c69ea975