Android: Add support for doing zipalign before doing apksigner

Adds support for doing zipalign before we use apksigner.

BRANCH=None
BUG=b:307968835
TEST=CQ
TEST=Manual in docker
TEST=./sign_android_unittests.sh

Change-Id: Idc580ac8842cf8f7945141a76500dde545c1945e
Signed-off-by: Varun Somani <vsomani@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/5607100
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed