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>

Common/System/System.h

@@ -167,7 +167,7 @@ enum SystemProperty {
 	SYSPROP_HAS_LOGIN_DIALOG,
 	SYSPROP_HAS_TEXT_CLIPBOARD,
 	SYSPROP_HAS_TEXT_INPUT_DIALOG,  // Indicates that System_InputBoxGetString is available.
-	SYSPROP_HAS_DEEP_LINKS,  // ios-style deep links
+	SYSPROP_HAS_DEEP_LINKS,  // iOS deep links, Android content URIs
 
 	SYSPROP_CAN_CREATE_SHORTCUT,
 	SYSPROP_CAN_SHOW_FILE,

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) {}

android/jni/app-android.cpp

@@ -404,6 +404,8 @@ bool System_GetPropertyBool(SystemProperty prop) {
 		return androidVersion >= 11;  // honeycomb
 	case SYSPROP_HAS_TEXT_CLIPBOARD:
 		return true;
+	case SYSPROP_HAS_DEEP_LINKS:
+		return true;  // The game's content URI, launchable through an intent.
 	case SYSPROP_CAN_LAUNCH_URL:
 		return true;
 	case SYSPROP_HAS_OPEN_DIRECTORY: