This API preallocates space for a Virtual A/B update. Test: pass Bug: 138808058 Change-Id: I34e34fbf6ac63bd189abda4a45cdac84b0e109d0
This API preallocates space for a Virtual A/B update. Test: pass Bug: 138808058 Change-Id: I34e34fbf6ac63bd189abda4a45cdac84b0e109d0