[external] First attempt to merge Khi external API

ion/include/ion.h

@@ -16,6 +16,7 @@
 #include <ion/storage.h>
 #include <ion/timing.h>
 #include <ion/usb.h>
+#include <ion/flash.h>
 #include <ion/unicode/utf8_decoder.h>
 #include <ion/unicode/utf8_helper.h>
 #include <stdint.h>

ion/include/ion/flash.h

@@ -0,0 +1,22 @@
+#ifndef ION_DEVICE_SHARED_FLASH_H
+#define ION_DEVICE_SHARED_FLASH_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+namespace Ion {
+namespace Device {
+namespace Flash {
+
+int TotalNumberOfSectors();
+int SectorAtAddress(uint32_t address);
+
+void MassErase();
+void EraseSector(int i);
+void WriteMemory(uint8_t * destination, uint8_t * source, size_t length);
+
+}
+}
+}
+
+#endif