D2: Revert "libhardware_legacy: Add support for FM feature."

This reverts commit 7a6298546d6480ad5b46668f8aa982cb2ba5a52a.
REVERT: STE_FMRDIO:enable STE_FM radio

Change-Id: I77ff268d37f0359c45600132281d5620c7c2d61d (reverted from commit 70677d67f343a187130f90131d09150758697015)
REVERT: fmradio: cleanup QCOM_FM_ENABLED/STE_FM defs and ifdef

Change-Id: Ia34dca04e6b9de3509987ad9d88a5fecc3820e2f (reverted from commit bbaefe5598ddab49a3d9570ec38fb3f12bb9e358)
REVERT: qcom-fm: audio: add support for FM feature

-Add set_fm_volume() to set handle fm volume

Change-Id: I2a2c6a60b9855d9360ff8fb90849517e77e5faab

Conflicts:

	audio/AudioPolicyManagerBase.cpp
	include/hardware_legacy/AudioSystemLegacy.h (reverted from commit eeab3b1d993ded7a0af741545e018314dc6ef39a)