Merge "Remove hashtree from builtin APEXes"

am: 21738f6032

Change-Id: Iaecfc7dcd196ac3ecd622049e4a78c90d8828be4

apex/apex.go

@@ -1213,6 +1213,13 @@ func (a *apexBundle) buildUnflattenedApex(ctx android.ModuleContext, apexType ap
 			optFlags = append(optFlags, "--assets_dir "+filepath.Dir(noticeFile.String()))
 		}
 
+		if !ctx.Config().UnbundledBuild() && a.installable() {
+			// Apexes which are supposed to be installed in builtin dirs(/system, etc)
+			// don't need hashtree for activation. Therefore, by removing hashtree from
+			// apex bundle (filesystem image in it, to be specific), we can save storage.
+			optFlags = append(optFlags, "--no_hashtree")
+		}
+
 		ctx.Build(pctx, android.BuildParams{
 			Rule:        apexRule,
 			Implicits:   implicitInputs,