Add one variable to decide if need TTS voice packs

For factory ROM UPH concern, we did not need TTS voice packs. Add one
variable to decide if need TTS voice packs and then it could reduce
super image size and increase flash station speed.

Bug: 314245991
Test: Check super image size and boot to home
Change-Id: Id84c3eef5a702317ab7976ded340b5795c0a3700
1 file changed