Update lynx SVN to 15 am: 298ba980a2 am: 721bf2d648 am: a560c0a552

Original change: https://googleplex-android-review.googlesource.com/c/device/google/lynx/+/24392319

Change-Id: Id9d85f1baa6574971a4d754b27661ebd1c51c355
Signed-off-by: Automerger Merge Worker <[email protected]>