BassClient: Use little endianness instead of big for synced BISes

Parsed value should be little endianness instead of big. Library bio
ByteBuffer by default use big endian format, this is invalid and not
needed - reverse ordered bits for BIS synced.

Test: presubmit
Test: atest BluetoothInstrumentationTests
Test: atest BassClientStateMachineTest
Bug: 150670922
Bug: 229965085
Tag: #feature
Sponsor: jpawlowski@
Change-Id: I395bd9bf4abd0b18f95e75e495fd92fc4c45d84e