Show memory full text only for internal storage

When the internal memory is full, a warning text is shown
in Settings/Storage. This warning was displayed for all
types of memory (internal/primary, sd card and usb storage)
even though it was only referring to the primary memory.
With this fix, it is only shown for the primary memory.

Change-Id: I35ad4b0b45c6752ddc9d7166495435b27fd4a170
Settings : Fix accessibility shortcut

Shortcuts like accessibility, have preferences with titleText rather than
titleRes as their title. Settings only had a override for titleText, which caused
preference screens inside accessibility to not work. This commit addresses that.

Reproducable via :

1. Create a settings accessibility shortcut.
2. Launch shortcut and try to open an of the services

Expected behaviour : Appropriate ToggleAccessibilityServicePreferenceFragment should open
Observed behaviour : Same Settings instead gets relaunched instead

Change-Id: I89b7539672cd7278d51f9e88bac1948669940e59