[core, android] Initial playtime implementation (#2535)

So firstly, playtime code is moved to src/common and qt specific code to yuzu/utils.cpp.

The dependency on ProfileManager was removed because it was working properly on Android, and I think a shared playtime is better behavior.
Now, playtime is stored in a file called "playtime.bin".

JNI code is from Azahar although modified by me, as well as that I added code to reset the game's playtime which was missing for some reason on there.

Before this gets merged, I plan to add the ability to manually edit the database as well.

Note: Code still needs a bit of cleanup.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2535
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Co-authored-by: inix <Nixy01@proton.me>
Co-committed-by: inix <Nixy01@proton.me>

src/frontend_common/play_time_manager.h

@@ -0,0 +1,56 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <map>
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include <common/polyfill_thread.h>
+
+// TODO(crueter): Extract this into frontend_common
+namespace Service::Account {
+class ProfileManager;
+}
+
+namespace PlayTime {
+
+using ProgramId = u64;
+using PlayTime = u64;
+using PlayTimeDatabase = std::map<ProgramId, PlayTime>;
+
+class PlayTimeManager {
+public:
+    explicit PlayTimeManager();
+    ~PlayTimeManager();
+
+    YUZU_NON_COPYABLE(PlayTimeManager);
+    YUZU_NON_MOVEABLE(PlayTimeManager);
+
+    u64 GetPlayTime(u64 program_id) const;
+    void ResetProgramPlayTime(u64 program_id);
+    void SetProgramId(u64 program_id);
+    void SetPlayTime(u64 program_id, u64 play_time);
+    void Start();
+    void Stop();
+
+    static std::string GetReadablePlayTime(u64 time_seconds);
+    static std::string GetPlayTimeHours(u64 time_seconds);
+    static std::string GetPlayTimeMinutes(u64 time_seconds);
+    static std::string GetPlayTimeSeconds(u64 time_seconds);
+
+private:
+    void AutoTimestamp(std::stop_token stop_token);
+    void Save();
+
+    PlayTimeDatabase database;
+    u64 running_program_id;
+    std::jthread play_time_thread;
+};
+
+
+} // namespace PlayTime