ADB Backup: add ability for TWRP GUI to restore

Restore adb backup files that TWRP made to your PC.
Put files in your backup directory to see them.

e.g. /sdcard/TWRP/BACKUPS/<sn>

Change-Id: I2c57970d77b64c39a302159041456e761c185259
diff --git a/twrp-functions.hpp b/twrp-functions.hpp
index 1f6b9b1..66781bb 100644
--- a/twrp-functions.hpp
+++ b/twrp-functions.hpp
@@ -98,6 +98,8 @@
 	static void Disable_Stock_Recovery_Replace(); // Disable stock ROMs from replacing TWRP with stock recovery
 	static unsigned long long IOCTL_Get_Block_Size(const char* block_device);
 	static void copy_kernel_log(string curr_storage); // Copy Kernel Log to Current Storage (PSTORE/KMSG)
+	static bool isNumber(string strtocheck); // return true if number, false if not a number
+	static int stream_adb_backup(string &Restore_Name); // Tell ADB Backup to Stream to TWRP from GUI selection
 
 private:
 	static void Copy_Log(string Source, string Destination);