Get current version from build.prop when not available in header

Description

For older android version, we don't send /e/ version in header, so we can use the current build when available

Issue(s)

https://gitlab.e.foundation/e/backlog/-/issues/6562

1. Download docker images
   • docker pull registry.gitlab.e.foundation/e/infra/lineageota:use-incremental-when-no-version-in-header
2. download following file and extract it within <home directory>/builds/full/test/FP3
   • http://ovh3.phie.ovh/testbuilds.zip

Test procedures

test new implementation

1. run

   docker run \
       -d \
       -p 80:80 \
       --rm \
       -v "${PWD}/builds:/var/www/html/builds" \
       --name OTAtest \
       registry.gitlab.e.foundation/e/infra/lineageota:use-incremental-when-no-version-in-header

2. test with Postman (Local server from -e-OTA.postman_collection.json)
   • device code: dreamlte
   • build type: test
   • incremental: eng.root.20220406.154003
3. check that 1.7 is available as an upgrade
4. change dreamlte/e-1.7-r-20230110250404-stable-dreamlte.zip.config.json, set "minOSVersion": "0.23" to "minOSVersion": "0.24"
5. check that this upgrade is not available anymore

fully validated on my own OTA test server>

Screenshots

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation