flutter app updates

flutter app updates

-ignore pubspec.lock file
-disable network access for do_compile
-remove loop to install config.toml; now handled by meta-flutter

Change-Id: Icdfb240c330e98a90cf05ca4f0acfbcd935bf89a
Signed-off-by: Joel Winarske <joel.winarske@gmail.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl-demo/+/30270
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
(cherry picked from commit 82c703554b58474c366108cced2d6bb2767d56cd)
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl-demo/+/30282
Tested-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>