fix(android): unblock mic permission startup

crates/chanora_audio/src/android_voice_unit.rs

@@ -1119,17 +1119,13 @@ fn call_voice_service_static(method: &str) -> bool {
             return false;
         }
     };
-    let class = match env.find_class(ANDROID_VOICE_FG_SERVICE_FQCN) {
-        Ok(c) => c,
-        Err(e) => {
-            let _ = env.exception_clear();
-            warn!(target: "chanora_audio", error = %e, method, "android: find_class failed");
-            return false;
-        }
-    };
     // SAFETY: ndk_context::context() is the application Context
     // jobject; valid global ref for process lifetime.
     let context_obj = unsafe { JObject::from_raw(ctx.context() as jni::sys::jobject) };
+    let class = match load_app_class(&mut env, &context_obj, ANDROID_VOICE_FG_SERVICE_FQCN) {
+        Some(c) => c,
+        None => return false,
+    };
     match env.call_static_method(
         &class,
         method,
@@ -1147,3 +1143,60 @@ fn call_voice_service_static(method: &str) -> bool {
         }
     }
 }
+
+fn load_app_class<'local>(
+    env: &mut jni::JNIEnv<'local>,
+    context_obj: &jni::objects::JObject<'local>,
+    slash_name: &str,
+) -> Option<jni::objects::JClass<'local>> {
+    match env.find_class(slash_name) {
+        Ok(c) => return Some(c),
+        Err(e) => {
+            let _ = env.exception_clear();
+            warn!(target: "chanora_audio", error = %e, class = slash_name, "android: find_class failed; retrying with app ClassLoader");
+        }
+    }
+
+    let loader = match env
+        .call_method(
+            context_obj,
+            "getClassLoader",
+            "()Ljava/lang/ClassLoader;",
+            &[],
+        )
+        .and_then(|v| v.l())
+    {
+        Ok(loader) => loader,
+        Err(e) => {
+            let _ = env.exception_clear();
+            warn!(target: "chanora_audio", error = %e, "android: Context.getClassLoader failed");
+            return None;
+        }
+    };
+    let dotted_name = slash_name.replace('/', ".");
+    let class_name = match env.new_string(&dotted_name) {
+        Ok(s) => s,
+        Err(e) => {
+            let _ = env.exception_clear();
+            warn!(target: "chanora_audio", error = %e, class = %dotted_name, "android: class-name string allocation failed");
+            return None;
+        }
+    };
+    let class_name_obj = jni::objects::JObject::from(class_name);
+    match env
+        .call_method(
+            &loader,
+            "loadClass",
+            "(Ljava/lang/String;)Ljava/lang/Class;",
+            &[jni::objects::JValue::Object(&class_name_obj)],
+        )
+        .and_then(|v| v.l())
+    {
+        Ok(class_obj) => Some(jni::objects::JClass::from(class_obj)),
+        Err(e) => {
+            let _ = env.exception_clear();
+            warn!(target: "chanora_audio", error = %e, class = %dotted_name, "android: ClassLoader.loadClass failed");
+            None
+        }
+    }
+}