Set a configurable flag for tag dispatch failed toast

It's a normal case when a device detects a tag but do nothing,
because there's no apps registered to handle it.
Don't show a toast by default, set to true if you need it.

Bug: 148996958
Test: read a tag without toast
Change-Id: I2d4e9193feadb9d9aafe6a85acf6fd26cc54d235
2 files changed