add mobile fallback platform verifier

Signed-off-by: 21pages <sunboeasy@gmail.com>

src/config.rs

@@ -5,7 +5,7 @@ use std::{
     net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr},
     ops::{Deref, DerefMut},
     path::{Path, PathBuf},
-    sync::{Mutex, RwLock},
+    sync::{atomic::AtomicBool, Mutex, RwLock},
     time::{Duration, Instant, SystemTime},
 };
 
@@ -72,6 +72,11 @@ lazy_static::lazy_static! {
     pub static ref BUILTIN_SETTINGS: RwLock<HashMap<String, String>> = Default::default();
 }
 
+#[cfg(target_os = "android")]
+lazy_static::lazy_static! {
+    pub static ref ANDROID_RUSTLS_PLATFORM_VERIFIER_INITIALIZED: AtomicBool = AtomicBool::new(false);
+}
+
 lazy_static::lazy_static! {
     pub static ref APP_DIR: RwLock<String> = Default::default();
 }