EncoderCapabilities: Adding HFR entry in EncoderCapabilities and JNI

--Adding HFR entries like max HFR mode, max HFR width & max HFR height
  in the EncoderCapabilities.java and android_media_MediaProfiles.cpp

Change-Id: I544a17e32ddd7ddccb0c48cf07b3199d2c485e09
CRs-Fixed: 589983
Tethering: fix NPE when retrieving active interfaces

When in airplane mode getActiveNetworkInfo() may return null.

Change-Id: Icba37abb51b9378c8af73d9f6587e04c588dd85e
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>