Enforce to include all quality values

We designed MediaQualityStatus to always have all quality values at removing UNSET value. However current builder with measurements being optional, encouraging apps to not fill in information. So, will remove Builder and make constructor of MediaQualityStatus as public.

Bug: 268027750
Test: atest CtsTelephonyTestCases
Change-Id: Iea290520c04cece8cc94d5a3f9dc15044144d1b2