Remove BasicShellCommandHandler from frameworks/base

BasicShellCommandHandler is used by mainline modules and the
framwork. There is a new repo that was created for putting
this kind of utility class. Remove BasicShellCommandHandler
from frameworks/base to frameworks/lib/modules-utils.

Bug: 170598012
Test: m
Change-Id: I81e01ba097392e8fe6eb27c01212a8fa1e4cbfad
Merged-In: Ida30c877116090616d4bf3f87fdad835446dac84