Android: And Lock and Unlock wrappers to HostThreadLock

This way we can ensure DeclareAsHostThread and UndeclareAsHostThread
are called when locking and unlocking.

Source/Android/jni/Host.h

@@ -12,13 +12,33 @@
 // sequentially for access.
 struct HostThreadLock
 {
-  static std::mutex s_host_identity_mutex;
-  std::unique_lock<std::mutex> m_lock;
-
+public:
   explicit HostThreadLock() : m_lock(s_host_identity_mutex) { Core::DeclareAsHostThread(); }
+
+  ~HostThreadLock()
+  {
+    if (m_lock.owns_lock())
+      Core::UndeclareAsHostThread();
+  }
+
   HostThreadLock(const HostThreadLock& other) = delete;
   HostThreadLock(HostThreadLock&& other) = delete;
   HostThreadLock& operator=(const HostThreadLock& other) = delete;
   HostThreadLock& operator=(HostThreadLock&& other) = delete;
-  ~HostThreadLock() { Core::UndeclareAsHostThread(); }
+
+  void Lock()
+  {
+    m_lock.lock();
+    Core::DeclareAsHostThread();
+  }
+
+  void Unlock()
+  {
+    m_lock.unlock();
+    Core::UndeclareAsHostThread();
+  }
+
+private:
+  static std::mutex s_host_identity_mutex;
+  std::unique_lock<std::mutex> m_lock;
 };

Source/Android/jni/MainAndroid.cpp

@@ -447,9 +447,9 @@ JNIEXPORT void JNICALL Java_org_dolphinemu_dolphinemu_NativeLibrary_SurfaceDestr
     while (s_is_booting.IsSet())
     {
       // Need to wait for boot to finish before we can pause
-      host_identity_guard.m_lock.unlock();
+      host_identity_guard.Unlock();
       std::this_thread::sleep_for(std::chrono::milliseconds(1));
-      host_identity_guard.m_lock.lock();
+      host_identity_guard.Lock();
     }
 
     if (Core::GetState() == Core::State::Running)
@@ -572,15 +572,15 @@ static void Run(JNIEnv* env, std::unique_ptr<BootParameters>&& boot, bool riivol
 
   while (Core::IsRunning())
   {
-    host_identity_guard.m_lock.unlock();
+    host_identity_guard.Unlock();
     s_update_main_frame_event.Wait();
-    host_identity_guard.m_lock.lock();
+    host_identity_guard.Lock();
     Core::HostDispatchJobs();
   }
 
   s_game_metadata_is_valid = false;
   Core::Shutdown();
-  host_identity_guard.m_lock.unlock();
+  host_identity_guard.Unlock();
 
   env->CallStaticVoidMethod(IDCache::GetNativeLibraryClass(),
                             IDCache::GetFinishEmulationActivity());