Make sure dist files have license metadata.

Bug: 151177513
Bug: 210912771

Test: m droid dist reportmissinglicenses

Change-Id: I0c85f6c49a3e9d9bb3219ed6ddfb939d90f80656

android/androidmk.go

@@ -288,6 +288,8 @@ func (a *AndroidMkEntries) AddCompatibilityTestSuites(suites ...string) {
 
 // The contributions to the dist.
 type distContributions struct {
+	// Path to license metadata file.
+	licenseMetadataFile Path
 	// List of goals and the dist copy instructions.
 	copiesForGoals []*copiesForGoals
 }
@@ -364,6 +366,8 @@ func (a *AndroidMkEntries) getDistContributions(mod blueprint.Module) *distContr
 	// Collate the contributions this module makes to the dist.
 	distContributions := &distContributions{}
 
+	distContributions.licenseMetadataFile = amod.licenseMetadataFile
+
 	// Iterate over this module's dist structs, merged from the dist and dists properties.
 	for _, dist := range amod.Dists() {
 		// Get the list of goals this dist should be enabled for. e.g. sdk, droidcore
@@ -454,6 +458,10 @@ func generateDistContributionsForMake(distContributions *distContributions) []st
 		ret = append(ret, fmt.Sprintf(".PHONY: %s\n", d.goals))
 		// Create dist-for-goals calls for each of the copy instructions.
 		for _, c := range d.copies {
+			ret = append(
+				ret,
+				fmt.Sprintf("$(if $(strip $(ALL_TARGETS.%s.META_LIC)),,$(eval ALL_TARGETS.%s.META_LIC := %s))\n",
+					c.from.String(), c.from.String(), distContributions.licenseMetadataFile.String()))
 			ret = append(
 				ret,
 				fmt.Sprintf("$(call dist-for-goals,%s,%s:%s)\n", d.goals, c.from.String(), c.dest))