Add filegroup support to notice property.

Also, replace all notice file references with the parent directory
pattern(../) with filegroups.

Bug: 118899640
Test: Manual build
Change-Id: I841345d747f41a3bb5beea66ad87a979734c39a4
diff --git a/android/androidmk.go b/android/androidmk.go
index 493ba97..f150768 100644
--- a/android/androidmk.go
+++ b/android/androidmk.go
@@ -277,8 +277,8 @@
 		}
 	}
 
-	if amod.commonProperties.Notice != nil {
-		fmt.Fprintln(&data.preamble, "LOCAL_NOTICE_FILE :=", "$(LOCAL_PATH)/"+*amod.commonProperties.Notice)
+	if amod.noticeFile != nil {
+		fmt.Fprintln(&data.preamble, "LOCAL_NOTICE_FILE :=", amod.noticeFile.String())
 	}
 
 	if host {