Update lynx SVN to 15 am: 298ba980a2 am: 6d1b69dcd9 am: c20d2b5535 am: 0ad661206c

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

Change-Id: Ife13ff365bc29db7441ac227b2dc93e0d55d0ff8
Signed-off-by: Automerger Merge Worker <[email protected]>