cm: config: Select the appropriate default alarm tone

In Nougat, CAF removed Helium as it is a duplicate of Hassium.
Switch back to choosing Hassium as the default alarm tone.

This essentially reverts commit 2b999181c8a7963b81a419366be2e022717f0601.

Change-Id: I62ff1565c76fddf2f744c26c44f30e940cf25b7b
1 file changed