Fix strip_prefix flags to strip install paths.

Bug: 235331488

Test: m droid dist

Change-Id: I3cd2af5d90e46a4c983728bc9b2d941d6ffda229
diff --git a/apex/builder.go b/apex/builder.go
index 9119363..a21fcb8 100644
--- a/apex/builder.go
+++ b/apex/builder.go
@@ -618,7 +618,12 @@
 
 		// Create a NOTICE file, and embed it as an asset file in the APEX.
 		a.htmlGzNotice = android.PathForModuleOut(ctx, "NOTICE.html.gz")
-		android.BuildNoticeHtmlOutputFromLicenseMetadata(ctx, a.htmlGzNotice, "", "", unsignedOutputFile.String())
+		android.BuildNoticeHtmlOutputFromLicenseMetadata(
+			ctx, a.htmlGzNotice, "", "",
+			[]string{
+				android.PathForModuleInstall(ctx).String() + "/",
+				android.PathForModuleInPartitionInstall(ctx, "apex").String() + "/",
+			})
 		noticeAssetPath := android.PathForModuleOut(ctx, "NOTICE", "NOTICE.html.gz")
 		builder := android.NewRuleBuilder(pctx, ctx)
 		builder.Command().Text("cp").