Annotate paths and deprecate ExtractSource(s)Deps

Add `android:"path"` to all properties that take paths to source
files, and remove the calls to ExtractSource(s)Deps, the
pathsDepsMutator will add the necessary SourceDepTag dependency.

Test: All soong tests
Change-Id: I488ba1a5d680aaa50b04fc38acf693e23c6d4d6d
diff --git a/xml/xml.go b/xml/xml.go
index 218d73c..d89327f 100644
--- a/xml/xml.go
+++ b/xml/xml.go
@@ -58,7 +58,7 @@
 
 type prebuiltEtcXmlProperties struct {
 	// Optional DTD that will be used to validate the xml file.
-	Schema *string
+	Schema *string `android:"path"`
 }
 
 type prebuiltEtcXml struct {
@@ -73,9 +73,6 @@
 
 func (p *prebuiltEtcXml) DepsMutator(ctx android.BottomUpMutatorContext) {
 	p.PrebuiltEtc.DepsMutator(ctx)
-
-	// To support ":modulename" in schema
-	android.ExtractSourceDeps(ctx, p.properties.Schema)
 }
 
 func (p *prebuiltEtcXml) GenerateAndroidBuildActions(ctx android.ModuleContext) {