ANDROID: ABI: update allowed list for exynosauto SoC

This patch is for updating GKI allowed symbol list without adding any
new symbol. Next patch will introduce newly added symbols for Exynosauto
SoC GKI vendor modules. To avoid unnecessary symbols, this patch also
adds "preserved by --additions-only" even though we don't need them
anymore.

Bug: 176138611
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Change-Id: I9fa9eb313ef1e2aeb8c853bae1c8cde18cdd9188