ANDROID: Disable check_defconfig for kernel_aarch64_tv.

When a config like CONFIG_DEBUG_INFO_BTF is disabled, relevant configs
in gki_defconfig (e.g. CONFIG_SCHED_CLASS_EXT and
CONFIG_MODULE_ALLOW_BTF_MISMATCH) are also disabled. But the check_defconfig
program does not know this. This change disables the check.

The downside of this change is that, if a config has a typo in
tv_gki.fragment, Kleaf will silently ignore the item. The developer
needs to verify that items in tv_gki.fragment are actually effective
and not outdated.

Bug: 415825866
Change-Id: I18798b3447fe62e69ea844f2f20641bc39bf8ddb
Signed-off-by: HONG Yifan <elsk@google.com>