sm8350-common: sepolicy: add rules for elliptic proximity

sepolicy/vendor/file_contexts

+# Audio
+/dev/socket/audio_hw_socket                                             u:object_r:audio_socket:s0
+/dev/elliptic(.*)?                    u:object_r:sound_device:s0
+
 # Battery
 /vendor/bin/batteryd		u:object_r:batteryd_exec:s0
 /vendor/bin/batterysecret		u:object_r:batterysecret_exec:s0

sepolicy/vendor/hal_audio_default.te

+type audio_socket, file_type;
+type sound_device, dev_type;
+
 set_prop(hal_audio_default, vendor_audio_prop)
+
+allow hal_audio_default audio_socket:sock_file rw_file_perms;
+allow hal_audio_default sound_device:chr_file rw_file_perms;

sepolicy/vendor/hal_sensors_default.te

+allow hal_sensors_default audio_socket:sock_file rw_file_perms;
+allow hal_sensors_default sound_device:chr_file rw_file_perms;