sm8250-common: sepolicy: label dt-gesture and allow power/sensor hal access

pstar uses the touchscreen_mmi via stmicro_mmi driver
this is a partial revert of
376db816f6

sepolicy/vendor/file.te

@@ -21,6 +21,7 @@ type fsg_file, file_type, contextmount_type, vendor_file_type;
 
 # Power
 type proc_sched_lib_mask_cpuinfo, proc_type, fs_type;
+type vendor_sysfs_dt2w, fs_type, sysfs_type;
 
 # Touchscreen
 type vendor_sysfs_touchpanel, fs_type, sysfs_type;