Build notice files from license metadata.

Switch from generate-notice-files.py and mergenotice.py to htmlnotice.

Bug: 151177513
Bug: 213388645
Bug: 210912771

Test: m droid dist reportmissinglicenses
Change-Id: I6cac049d24f35ec358c6f341a04f4ba6161703bf

apex/androidmk.go

@@ -396,10 +396,6 @@ func (a *apexBundle) androidMkForType() android.AndroidMkData {
 				}
 				a.writeRequiredModules(w, moduleNames)
 
-				if a.mergedNotices.Merged.Valid() {
-					fmt.Fprintln(w, "LOCAL_NOTICE_FILE :=", a.mergedNotices.Merged.Path().String())
-				}
-
 				fmt.Fprintln(w, "include $(BUILD_PREBUILT)")
 
 				if apexType == imageApex {