Revert "java_sdk_library: Improve consistency with ..._import"

This reverts commit dce3fe78f0.

Reason for revert: Broke presubmit: b/157231582

Change-Id: I638e0e090f3242ed5a9a3134cbe380e872411247

java/droiddoc.go

@@ -350,16 +350,11 @@ type ApiFilePath interface {
 	ApiFilePath() android.Path
 }
 
-type ApiStubsSrcProvider interface {
-	StubsSrcJar() android.Path
-}
-
 // Provider of information about API stubs, used by java_sdk_library.
 type ApiStubsProvider interface {
 	ApiFilePath
 	RemovedApiFilePath() android.Path
-
-	ApiStubsSrcProvider
+	StubsSrcJar() android.Path
 }
 
 //
@@ -1920,10 +1915,6 @@ func (p *PrebuiltStubsSources) OutputFiles(tag string) (android.Paths, error) {
 	}
 }
 
-func (d *PrebuiltStubsSources) StubsSrcJar() android.Path {
-	return d.stubsSrcJar
-}
-
 func (p *PrebuiltStubsSources) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	p.stubsSrcJar = android.PathForModuleOut(ctx, ctx.ModuleName()+"-"+"stubs.srcjar")