Added JNI layer and Java class for Send Tab To Self Android notifications

Bug: 921767
Change-Id: I6a61cf9949de5ccf5853ab0c62fb60a1a6622ad8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1490394
Commit-Queue: Tanya Gupta <tgupta@chromium.org>
Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Reviewed-by: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#639135}
14 files changed