Add "align file size" option to ApkSigner am: c2a8da1913

Original change: https://android-review.googlesource.com/c/platform/tools/apksig/+/2128975

Change-Id: Ib683b5e4336d4ea127177fa2445c006c94d7eedf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>