input: add keymapping and handle www/com key for keypads in ics

Based off of this commit, updated for ics:
https://github.com/CyanogenMod/android_frameworks_base/commit/ebb5e47760cc156fba6d6a93ad0dfaeb562f4771

Allows keypads to have custom keymapping, and brings back www./.com key
function

Fixed: Corrected all wrong entries to api/current.txt,
including for those that already passed gerrit review
@hide used in java for all non aosp api

Change-Id: I0ffb35dae441e3ef7a4924492cc9168939551d3f