Add --skip-update-bootloader support in flash_device.sh.

Replace ! -z with -n in flash_device.sh.

Test: kernel/tests/tools/flash_device.sh -s xxx -pb ab://git_tm-qpr-dev -kb ab://aosp_kernel-common-android13-5.10/kernel_aarch64/latest --skip-update-bootloader
Bug: 409625121
Change-Id: Iba72371e7818c88700bf8e6b61ee9a0133111eca
1 file changed
tree: 66b2268aedd6b2c5b8f5200c4f2d6e506b40383e
  1. net/
  2. tools/
  3. METADATA