Update TW storage paths and remove unneeded flags

While these TW_INTERNAL_STORAGE_* definitions are mostly obsolete, there
still seems to be some crypto code that looks for them. Go ahead and
define them.

The flags removed from recovery.fstab are already generated by
partition.cpp, based on the mount point.

Change-Id: I7f165aac03c57a291c9be892da8f33bd6d326cc8

BoardConfig.mk

@@ -52,6 +52,8 @@ BOARD_CHARGING_MODE_BOOTING_LPM := /sys/htc_lpm/lpm_mode
 # TWRP
 DEVICE_RESOLUTION := 540x960
 TW_FLASH_FROM_STORAGE := true
+TW_INTERNAL_STORAGE_PATH := "/internal_sd"
+TW_INTERNAL_STORAGE_MOUNT_POINT := "internal_sd"
 BOARD_HAS_NO_REAL_SDCARD := true
 RECOVERY_GRAPHICS_USE_LINELENGTH := true
 TARGET_RECOVERY_PIXEL_FORMAT := "RGBX_8888"

recovery.fstab

@@ -7,6 +7,5 @@
 /recovery       emmc        /dev/block/mmcblk0p22
 /system         ext4        /dev/block/mmcblk0p33
 /devlog         ext4        /dev/block/mmcblk0p26
-/internal_sd    vfat        /dev/block/mmcblk0p36   flags=display="Internal Storage";settingsstorage;wipeingui
+/internal_sd    vfat        /dev/block/mmcblk0p36   flags=display="Internal Storage"
 /usb-otg        vfat        /dev/block/sda1         /dev/block/sda  flags=display="USB-OTG";storage;wipeingui;removable
-