Revert^2 "Add one variable to decide if need TTS voice packs"

This reverts commit b4a21a0e1417c329ea9a80c85d80ff7da4cd9244.

Reason for revert: <TalkBack issue cause by this patch. We always include the voice_packs.mk for non factory target >

Bug: 140145973
Change-Id: I865ff7b4d2d25d0135d5df742c201fcc00b0525e
1 file changed