Dump BOARD_PARTIAL_OTA_UPDATE_PARTITIONS_LIST into misc_info.txt

Cuttlefish doesn't support updating the vendor partition. So we change
ota_from_target_files to only generate updates for partitions in
BOARD_PARTIAL_OTA_UPDATE_PARTITIONS_LIST. This CL puts the prop in
misc_info.txt, which will be read by ota scrips

Bug: 171999375
Test: mm -j
Change-Id: I4d9c97c717cb73806f95684b3bc81ef285ccbb8b