Convert CheckMinSdkVersion to use providers.

Next step is to convert it to use ModuleProxy once IsDepInSameApex is
converted to use providers.

Bug: 377723687
Test: Unit tests and compare the ninja and mk files generated.
Change-Id: I20cb052666fa95eb964e63e3302ac892d3324183
diff --git a/java/bootclasspath_fragment.go b/java/bootclasspath_fragment.go
index 8383a5a..7a3c21e 100644
--- a/java/bootclasspath_fragment.go
+++ b/java/bootclasspath_fragment.go
@@ -252,6 +252,8 @@
 	profilePathErr error
 }
 
+var _ android.ApexModule = (*BootclasspathFragmentModule)(nil)
+
 // commonBootclasspathFragment defines the methods that are implemented by both source and prebuilt
 // bootclasspath fragment modules.
 type commonBootclasspathFragment interface {
@@ -454,8 +456,8 @@
 	panic(fmt.Errorf("boot_image module should not have a dependency tag %s", android.PrettyPrintTag(tag)))
 }
 
-func (b *BootclasspathFragmentModule) ShouldSupportSdkVersion(ctx android.BaseModuleContext, sdkVersion android.ApiLevel) error {
-	return nil
+func (m *BootclasspathFragmentModule) MinSdkVersionSupported(ctx android.BaseModuleContext) android.ApiLevel {
+	return android.MinApiLevel
 }
 
 // ComponentDepsMutator adds dependencies onto modules before any prebuilt modules without a