Remove unused dependency on libhardware from bufferhubd

'libhardware' doesn't seem to be used anymore. Remove it.

Bug: None
Test: `m -j32` succeeds.
Change-Id: I2ff002ce17d920f44509347ca86ca5f030348cf5
(cherry picked from commit f9f18b6b5c413ffeb8cc3ac67dd49bc17364a76f)
1 file changed