Autogenerate an android_info module for vendor build.prop

vendor build.prop contains additional board specific properties. An
android_info module will be autogenerated and added as a dep of the
autogenerated vendor-build.prop

The autogenerated module will be created in the root directory, to avoid
complexities such as
1. Creation of additional filegroups if `TARGET_BOARD_INFO_FILES` are
   distributed throughout the tree
2. Scenarios where the filegroups are in a directory that that is
   outside the root soong namespace.

Bug: 375500423
Test: verified that vendor/build.prop is same for kati and soong for
`oriole` (modulo timestamp diffs)

Change-Id: I038a6fc5a5ad87de3cd987be5bdfdbbb1384d0e5