Adding sepolicy rules to qva folder

Added label 'u:object_r:sysfs_devfreq:s0'
to gpubw node and 'u:object_r:lm_data_file:s0'
to LM path in file_context for qva and added
mlstrustedsubject for hal_perf_default

Change-Id: I5c035c5fcce7cb29113f377c436e38844e52feab