default CI docker image
Fixes build error where andrewstone/android_ndk_cmake_cpp:latest
requested and not found: https://gitlab.com/wallywallet/android/-/jobs/6511497143
I don't know why the build is trying to pull andrewstone/android_ndk_cmake_cpp:latest
Adding a default docker image for Gitlab CI: andrewstone/nexaadk:latest
passes the build
The pages
job in GitLab CI is passed and unblocks the deployment stage on mp
branch pipelines.
Edited by Jørgen Svennevik Notland