Add a new option in recovery menu to test the background texts

Add a new option "Run locale test" to check the background text
images (i.e. texts for "erasing", "error", "no_command" and "installing"
with different locales.)

Use volume up/down button to cycle through all the locales embedded in
the png file, and power button to go back to recovery main menu.

Test: Run locale test with bullhead.
Change-Id: Ib16e119f372110cdb5e611ef497b0f9b9b418f51

device.cpp

@@ -17,34 +17,36 @@
 #include "device.h"
 
 static const char* MENU_ITEMS[] = {
-    "Reboot system now",
-    "Reboot to bootloader",
-    "Apply update from ADB",
-    "Apply update from SD card",
-    "Wipe data/factory reset",
+  "Reboot system now",
+  "Reboot to bootloader",
+  "Apply update from ADB",
+  "Apply update from SD card",
+  "Wipe data/factory reset",
 #ifndef AB_OTA_UPDATER
-    "Wipe cache partition",
+  "Wipe cache partition",
 #endif  // !AB_OTA_UPDATER
-    "Mount /system",
-    "View recovery logs",
-    "Run graphics test",
-    "Power off",
-    NULL,
+  "Mount /system",
+  "View recovery logs",
+  "Run graphics test",
+  "Run locale test",
+  "Power off",
+  nullptr,
 };
 
 static const Device::BuiltinAction MENU_ACTIONS[] = {
-    Device::REBOOT,
-    Device::REBOOT_BOOTLOADER,
-    Device::APPLY_ADB_SIDELOAD,
-    Device::APPLY_SDCARD,
-    Device::WIPE_DATA,
+  Device::REBOOT,
+  Device::REBOOT_BOOTLOADER,
+  Device::APPLY_ADB_SIDELOAD,
+  Device::APPLY_SDCARD,
+  Device::WIPE_DATA,
 #ifndef AB_OTA_UPDATER
-    Device::WIPE_CACHE,
+  Device::WIPE_CACHE,
 #endif  // !AB_OTA_UPDATER
-    Device::MOUNT_SYSTEM,
-    Device::VIEW_RECOVERY_LOGS,
-    Device::RUN_GRAPHICS_TEST,
-    Device::SHUTDOWN,
+  Device::MOUNT_SYSTEM,
+  Device::VIEW_RECOVERY_LOGS,
+  Device::RUN_GRAPHICS_TEST,
+  Device::RUN_LOCALE_TEST,
+  Device::SHUTDOWN,
 };
 
 static_assert(sizeof(MENU_ITEMS) / sizeof(MENU_ITEMS[0]) ==