Increase size of vendor partition to 64M am: 11183cbc9e am: 405446aef6

Original change: https://android-review.googlesource.com/c/device/generic/trusty/+/2825375

Change-Id: Ic3e709206c6294947e947382bcd026d7c405569e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>