Convert NewProvider/NewMutatorProvider to generic providers API

Convert all of the callers to NewProvider and NewMutatorProvider
to use a generic type parameter instead of an example object.

Bug: 316410648
Test: builds
Change-Id: Ic9cdafc87336e26730d3fd596df05de0e7267542
diff --git a/java/test_spec_test.go b/java/test_spec_test.go
index 7f06785..1409b28 100644
--- a/java/test_spec_test.go
+++ b/java/test_spec_test.go
@@ -122,7 +122,7 @@
 }
 
 func runTestSpecTest(
-		t *testing.T, errorHandler android.FixtureErrorHandler, bp string,
+	t *testing.T, errorHandler android.FixtureErrorHandler, bp string,
 ) *android.TestResult {
 	return android.GroupFixturePreparers(
 		soongTesting.PrepareForTestWithTestingBuildComponents,