Remove DistFiles from AndroidMk datastructures

The code that collects dists also supports getting them from
OutputFiles. Switch the few remaining usages of AndroidMk-based
disted files over to OutputFiles, and remove DistFiles from the
AndroidMk datastructures.

This should allow us to clean up more AndroidMk code in a followup
cl.

Bug: 398938465
Test: Confirmed that the ninja files for "m nothing dist" don't change after this cl.
Change-Id: I9eaed21018ef73ec36276556e7daa7201b272009
diff --git a/android/androidmk.go b/android/androidmk.go
index d9d78f3..5cb5a66 100644
--- a/android/androidmk.go
+++ b/android/androidmk.go
@@ -107,8 +107,6 @@
 	SubName string
 	// If set, this value overrides the base module name. SubName is still appended.
 	OverrideName string
-	// Dist files to output
-	DistFiles TaggedDistFiles
 	// The output file for Kati to process and/or install. If absent, the module is skipped.
 	OutputFile OptionalPath
 	// If true, the module is skipped and does not appear on the final Android-<product name>.mk
@@ -360,15 +358,9 @@
 	// Start with an empty (nil) set.
 	var availableTaggedDists TaggedDistFiles
 
-	// Then merge in any that are provided explicitly by the module.
-	if a.DistFiles != nil {
-		// Merge the DistFiles into the set.
-		availableTaggedDists = availableTaggedDists.merge(a.DistFiles)
-	}
-
 	// If no paths have been provided for the DefaultDistTag and the output file is
 	// valid then add that as the default dist path.
-	if _, ok := availableTaggedDists[DefaultDistTag]; !ok && a.OutputFile.Valid() {
+	if a.OutputFile.Valid() {
 		availableTaggedDists = availableTaggedDists.addPathsForTag(DefaultDistTag, a.OutputFile.Path())
 	}
 
@@ -1295,8 +1287,6 @@
 	SubName string
 	// If set, this value overrides the base module name. SubName is still appended.
 	OverrideName string
-	// Dist files to output
-	DistFiles TaggedDistFiles
 	// The output file for Kati to process and/or install. If absent, the module is skipped.
 	OutputFile OptionalPath
 	// If true, the module is skipped and does not appear on the final Android-<product name>.mk
@@ -1682,15 +1672,9 @@
 	// Start with an empty (nil) set.
 	var availableTaggedDists TaggedDistFiles
 
-	// Then merge in any that are provided explicitly by the module.
-	if a.DistFiles != nil {
-		// Merge the DistFiles into the set.
-		availableTaggedDists = availableTaggedDists.merge(a.DistFiles)
-	}
-
 	// If no paths have been provided for the DefaultDistTag and the output file is
 	// valid then add that as the default dist path.
-	if _, ok := availableTaggedDists[DefaultDistTag]; !ok && a.OutputFile.Valid() {
+	if a.OutputFile.Valid() {
 		availableTaggedDists = availableTaggedDists.addPathsForTag(DefaultDistTag, a.OutputFile.Path())
 	}
 
@@ -1815,9 +1799,8 @@
 		Class:        mkinfo.Class,
 		SubName:      mkinfo.SubName,
 		OverrideName: mkinfo.OverrideName,
-		// There is no modification on DistFiles or OutputFile, so no need to
+		// There is no modification on OutputFile, so no need to
 		// make their deep copy.
-		DistFiles:       mkinfo.DistFiles,
 		OutputFile:      mkinfo.OutputFile,
 		Disabled:        mkinfo.Disabled,
 		Include:         mkinfo.Include,