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These have been created to reduce the size and complexity
of frameworks/base.

mms-common was created by moving all of
  frameworks/base/core/java/com/google/android/mms
to:
  frameworks/opt/mms

telephony-common was created by moving some of
  frameworks/base/telephony
to:
  frameworks/opt/telephony

Change-Id: I5613c1447dbe655c55f9ba499e453bb59a06c4c0