Make OutputFileForModule work for AllowMissingDependencies

Report missing output files as missing dependencies when
AllowMissingDependencies is enabled.  This will fix
AllowMissingDependencies builds where a dependency module is
present but missing support for a specific architecture.

Bug: 250918230
Test: lunch aosp_riscv64-userdebug && m ALLOW_MISSING_DEPENDENCIES=true nothing
Test: TestOutputFileForModule
Change-Id: I95e96e3e7cb3df7bf678ed628b45baf659addbad

android/android_test.go

@@ -15,10 +15,32 @@
 package android
 
 import (
+	"io/ioutil"
 	"os"
 	"testing"
 )
 
-func TestMain(m *testing.M) {
-	os.Exit(m.Run())
+var buildDir string
+
+func setUp() {
+	var err error
+	buildDir, err = ioutil.TempDir("", "android_test")
+	if err != nil {
+		panic(err)
+	}
+}
+
+func tearDown() {
+	os.RemoveAll(buildDir)
+}
+
+func TestMain(m *testing.M) {
+	run := func() int {
+		setUp()
+		defer tearDown()
+
+		return m.Run()
+	}
+
+	os.Exit(run())
 }