audio: Fix handling of dynamic profiles in VtsHalAudioV7_0TargetTest

The profiles generator wasn't loading correctly from the Audio
Policy Manager config file profiles with unpopulated attributes,
which is typical for dynamic profiles.

Bug: 204314749
Test: atest HalAudioV7_0GeneratorTest
Change-Id: I514a4e03da165cacb5dbaaa16470130895681484
Merged-In: I514a4e03da165cacb5dbaaa16470130895681484
(cherry picked from commit adf84c03)