Require changeable volume for VolumeLevelChange CTS-V The Volume Level Change CTS-V requrie that the volume can be changed in the device, so the test should be skipped if "config_useFixedVolume" is set to true. Bug: 272714705 Test: CTS-verifer Test: "Volume Level Changes" (cherry picked from https://android-review.googlesource.com/q/commit:f502866faf1a7a495c1605c56e4fa5018054c2f9) Merged-In: Ic75a942d80cc462d1a1e765a7cf0fa6991f18b2d Change-Id: Ic75a942d80cc462d1a1e765a7cf0fa6991f18b2d