Add search, favorites tab, and persistent favorites

Replace static console filter with swipeable tabs (All / Favorites /
per-console) and a collapsible search icon in the app bar. Persist
favorites via SharedPreferences keyed by ROM path. Display titles are
now cleaned (region tags stripped) for better UX while raw filenames
are preserved for cover art lookups. Sort games alphabetically and
fetch cover art in parallel (8 concurrent) for faster initial load.

Also fix PS1 controller setup so it works with both new games and save
states: pcsx_rearmed needs retro_set_controller_port_device called at
a specific point inside loadCore (between callbacks and get_system_info)
which FCEUmm crashes on. Added a "pending controller device" mechanism
that the Kotlin core can pre-set before nativeLoadCore. Save states are
now loaded BEFORE start() so the game's first frame already has the
restored state, avoiding the "controller removed" detection race.

app/src/main/cpp/libretro_frontend.h

@@ -45,6 +45,7 @@ public:
     void setSystemDir(const char* dir);
     void setSaveDir(const char* dir);
     void setControllerPortDevice(unsigned port, unsigned device);
+    void setPendingControllerDevice(int device);
     void setCoreOption(const char* key, const char* value);
 
     bool isRunning() const { return running_.load(); }
@@ -121,6 +122,10 @@ private:
     std::vector<uint8_t> rom_data_;
     bool need_fullpath_ = true;
 
+    // Pending controller device (set by frontend before loadCore, applied during loadCore)
+    // -1 means "do not call retro_set_controller_port_device" (default)
+    int pending_controller_device_ = -1;
+
     // Frame timing
     double target_fps_ = 60.0;
     int frame_skip_ = 0;