Add support for installation realme/OPPO OTA

Support for '--special_update_package' command from boot message

For example realmeUI 2.0 using this command for boot message to install OTA packages
--special_update_package=/data/ota_package/OTA/.otaPackage/system_vendor_19720.1.3.202108120000042554318_patch

Change-Id: I7d1a49a3e05a439d4c96717c1700dd063f4e55c4

startupArgs.cpp

@@ -51,7 +51,7 @@ bool startupArgs::processRecoveryArgs(std::vector<std::string> args, int index)
 			android::base::SetProperty("sys.usb.config", "fastboot");
 			DataManager::SetValue("tw_enable_adb", 0);
 			DataManager::SetValue("tw_enable_fastboot", 1);
-		} else if (args[index].find(UPDATE_PACKAGE) != std::string::npos) {
+		} else if (args[index].find(UPDATE_PACKAGE) != std::string::npos || args[index].find(SPECIAL_UPDATE_PACKAGE) != std::string::npos) {
 			std::string::size_type eq_pos = args[index].find("=");
 			std::string arg = args[index].substr(eq_pos + 1, args[index].size());
 			if (arg.size() == 0) {

startupArgs.hpp

@@ -33,6 +33,7 @@
 class startupArgs {
 public:
 	static inline std::string const UPDATE_PACKAGE = "--update_package";
+	static inline std::string const SPECIAL_UPDATE_PACKAGE = "--special_update_package";
 	static inline std::string const WIPE_CACHE = "--wipe_cache";
 	static inline std::string const WIPE_DATA = "--wipe_data";
 	static inline std::string const SEND_INTENT = "--send_intent";