Implement URI decode scheme for NfcBarcode tag technology

NfcBarcode tag technology has been supported since API 17 for
the Barcode ID function. This patch implements the publicly available
URI decoding scheme, linked in Android API docs since 2013 but not yet
implemented in the code. http://www., https://www

., http://,
and https:// prefixes are supported, and an optional terminator 0xfe
is supported for variable length URIs.

Change-Id: Iadf0c0d1b809d78dc2cb7159ef6382868ccd0ed6
Signed-off-by: Bartek Teodorczyk <bartek.teodorczyk@microemu.com>