vm/adb: switch adb to root
vm/adb: switch adb to root

Userdebug builds have adb under 'shell' user by default.
Switch to root user before starting fuzzing.

google/syzkaller,zoulasc/syzkaller,dotweiba/syzkaller,xairy/syzkaller,hyz0906/syzkaller,hyz0906/syzkaller,google/syzkaller,hyz0906/syzkaller,hyz0906/syzkaller,xairy/syzkaller,xairy/syzkaller,zoulasc/syzkaller,xairy/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,zoulasc/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,dotweiba/syzkaller,google/syzkaller,dotweiba/syzkaller,zoulasc/syzkaller,google/syzkaller,dotweiba/syzkaller,hyz0906/syzkaller