Release boot session data during Netplay cleanup

Boot session data is already handled when the game is booted so this is just fallback in case the game launch fails in some weird way.

Add missing @Keep annotations to functions called from C++

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/netplay/Netplay.kt

@@ -27,8 +27,6 @@ import org.dolphinemu.dolphinemu.features.netplay.model.ConnectionType
 import org.dolphinemu.dolphinemu.features.netplay.model.NetplayMessage
 import org.dolphinemu.dolphinemu.features.netplay.model.Player
 
-//TODO add other necessary @Keep annotations
-//TODO clear boot session data at appropriate time
 object Netplay {
     @Keep
     private var netPlayClientPointer: Long = 0
@@ -123,6 +121,11 @@ object Netplay {
         sessionScope?.cancel()
         sessionScope = null
 
+        if (bootSessionDataPointer != 0L) {
+            ReleaseBootSessionData()
+            bootSessionDataPointer = 0
+        }
+
         if (netPlayClientPointer != 0L) {
             ReleaseNetplayClient()
             netPlayClientPointer = 0
@@ -158,6 +161,9 @@ object Netplay {
     @JvmStatic
     external fun adjustPadBufferSize(buffer: Int)
 
+    @JvmStatic
+    private external fun ReleaseBootSessionData()
+
     @JvmStatic
     private external fun ReleaseNetplayClient()
 
@@ -170,6 +176,7 @@ object Netplay {
 
     // NetPlayUI callbacks
 
+    @Keep
     @JvmStatic
     fun onBootGame(gameFilePath: String, bootSessionDataPointer: Long) {
         this.bootSessionDataPointer = bootSessionDataPointer
@@ -189,31 +196,37 @@ object Netplay {
         _connectionLost.trySend(Unit)
     }
 
+    @Keep
     @JvmStatic
     fun onConnectionError(message: String) {
         _connectionErrors.trySend(message)
     }
 
+    @Keep
     @JvmStatic
     fun onUpdate(players: Array<Player>) {
         _players.tryEmit(players.toList())
     }
 
+    @Keep
     @JvmStatic
     fun onChatMessageReceived(message: String) {
         _chatMessages.tryEmit(message)
     }
 
+    @Keep
     @JvmStatic
     fun onHostInputAuthorityChanged(enabled: Boolean) {
         _hostInputAuthorityEnabled.tryEmit(enabled)
     }
 
+    @Keep
     @JvmStatic
     fun onGameChanged(game: String) {
         _game.tryEmit(game)
     }
 
+    @Keep
     @JvmStatic
     fun onPadBufferChanged(buffer: Int) {
         // Only for remote pad buffer settings. Ignore local max buffer changes.

Source/Android/jni/NetPlay/Netplay.cpp

@@ -8,6 +8,7 @@
 #include <jni.h>
 
 #include "Common/CommonTypes.h"
+#include "Core/Boot/Boot.h"
 #include "Core/Config/NetplaySettings.h"
 #include "Core/NetPlayClient.h"
 #include "UICommon/GameFile.h"
@@ -166,6 +167,15 @@ Java_org_dolphinemu_dolphinemu_features_netplay_Netplay_Join(JNIEnv* env, jclass
   return reinterpret_cast<jlong>(client);
 }
 
+JNIEXPORT void JNICALL
+Java_org_dolphinemu_dolphinemu_features_netplay_Netplay_ReleaseBootSessionData(JNIEnv* env, jclass)
+{
+  auto* data = reinterpret_cast<BootSessionData*>(
+      env->GetStaticLongField(IDCache::GetNetplayClass(), IDCache::GetNetplayBootSessionDataPointer()));
+  delete data;
+  env->SetStaticLongField(IDCache::GetNetplayClass(), IDCache::GetNetplayBootSessionDataPointer(), 0);
+}
+
 JNIEXPORT void JNICALL
 Java_org_dolphinemu_dolphinemu_features_netplay_Netplay_ReleaseNetplayClient(JNIEnv* env, jclass)
 {