input: Add workaround for broken hardware keyboard support

* Add workaround var for devices with broken kernels

Change-Id: Ib6ade70f399067469ba5aece48c6ec4608125d75
telephony: SignalStrengh: Don't calculate a LTE snr if the srq is invalid

If the previous values are invalid and signal quality is -1, chances are there's
no LTE signal at all, so don't calculate the SNR and mark it invalid as well.

This fixes the strength indicator in GSM devices where it was being skewed
by the ghost LTE value

Change-Id: I070573401c141aa99941a332ee256246697abb90
Suppress String resources build warnings

warnings suppressed are:
aapt: warning: **** string '%s' has no default or required localization for
aapt: warning: string '%s' has no default translation in

Patch Set 2: move ifdef and only suppress warnings for packages that
             define NO_DEFAULT_TRANSLATION_WARNINGS and/or
             NO_LOCALIZATION_WARNING

Patch Set 3: by default do not show warnings unless
             SHOW_DEFAULT_TRANSLATION_WARNINGS and/or
             SHOW_LOCALIZATION_WARNINGS

Change-Id: I50ef2a623959a1cc53053b446328df8e34cc99e8