EqualizerTest: Refactor Equalizer VTS Target Test

This change refactors the VtsHalEqualizerTargetTest by introducing the EqualizerTestHelper class and the EqualizerParamTest class, which inherits from the helper class. The refactor retains the original test's behavior.

Bug: 305866207
Test: atest VtsHalEqualizerTargetTest

Change-Id: Idd370886f10eb0050ab650ba7abb36175f73a14f
1 file changed