feat: share more code from android branch

rules/provider/patch_android.go

@@ -0,0 +1,27 @@
+// +build android
+
+package provider
+
+import "time"
+
+var (
+	suspended bool
+)
+
+type UpdatableProvider interface {
+	UpdatedAt() time.Time
+}
+
+func (f *ruleSetProvider) UpdatedAt() time.Time {
+	return f.Fetcher.UpdatedAt
+}
+
+func (rp *ruleSetProvider) Close() error {
+	rp.Fetcher.Destroy()
+
+	return nil
+}
+
+func Suspend(s bool) {
+	suspended = s
+}