bp2build: convert paths/module refs to Bazel label

This currently expands all globs, still need to support converting glob
syntax.

Test: go build_conversion_test
Test: GENERATE_BAZEL_FILES=true m nothing
Test: m nothing
Bug: 165114590
Change-Id: If7b26e8e663d17566fad9614ca87a8da1f095284
diff --git a/apex/deapexer.go b/apex/deapexer.go
index 651cadf..8f4a285 100644
--- a/apex/deapexer.go
+++ b/apex/deapexer.go
@@ -78,12 +78,17 @@
 	return p.prebuilt.Name(p.ModuleBase.Name())
 }
 
-func (p *Deapexer) DepsMutator(ctx android.BottomUpMutatorContext) {
-	if err := p.apexFileProperties.selectSource(ctx); err != nil {
-		ctx.ModuleErrorf("%s", err)
+func deapexerSelectSourceMutator(ctx android.BottomUpMutatorContext) {
+	p, ok := ctx.Module().(*Deapexer)
+	if !ok {
 		return
 	}
+	if err := p.apexFileProperties.selectSource(ctx); err != nil {
+		ctx.ModuleErrorf("%s", err)
+	}
+}
 
+func (p *Deapexer) DepsMutator(ctx android.BottomUpMutatorContext) {
 	// Add dependencies from the java modules to which this exports files from the `.apex` file onto
 	// this module so that they can access the `DeapexerInfo` object that this provides.
 	for _, lib := range p.properties.Exported_java_libs {