Make change and version bump to r_aml_300900100 for mainline module file: packages/Tethering/apex/manifest.json

Change-Id: I182d7ddf35e0684e7b6cb54fed43662a26a9d3dd
tree: 0b6b3ef9fcb74fb566dc2ab839747f3066f3c483
  1. Tethering/