Android: Enable "Copy deep link" on the game screen, copying the content URI

PPSSPP has access to the URI, so a frontend or adb can launch the game with it,
which isn't true of a plain path on modern Android.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

UI/GameScreen.cpp

@@ -63,6 +63,11 @@
 // This is in an objective-C file.
 #if PPSSPP_PLATFORM(IOS)
 void copyDeepLinkForPath(std::string_view filePath);
+#elif PPSSPP_PLATFORM(ANDROID)
+// The path is a content URI that PPSSPP has access to, so frontends and adb can launch it.
+void copyDeepLinkForPath(std::string_view filePath) {
+	System_CopyStringToClipboard(std::string(filePath));
+}
 #else
 // dummy
 void copyDeepLinkForPath(std::string_view) {}