Fixed issue where XmlPullParserExceptions are thrown with

Theme defined GradientDrawable attributes

Fixed issue where attributes that are supposed to be defined
together would throw exceptions if they are configured through
multiple inflation passes both with and without theme attributes.
Removed conditional logic that would parse attributes only
if the corresponding gradient type matched. Instead, attributes
are parsed on each inflation pass, falling back on previously
resolved parameters in the absence of a field. Validation
of the radius parameters has moved to ensureValidRect

Test: Added test to GradientDrawableTest
Bug: 127838188
Change-Id: Ie05e416eb747c774b9a39d4d0be28e1e775f0db5