m7-common: add default wallpaper
m7-common: update mms overlays

frameworks/base - default config.xml:
- Remove content disposition override which should be limited to Sprint.

mcc311/mnc480:
- Remove overlays which duplicate the default configuration.
- Remove overrides for defaultMMSMessagesPerThread and
  defaultSMSMessagesPerThread.

mcc310mnc120:
- Remove overlays which duplicate the default configuration.
- Remove overrides for defaultMMSMessagesPerThread and
  defaultSMSMessagesPerThread.
- Remove enableSprintVVM which seems to no longer be used.

Change-Id: I6d8f089856c377b40752019f751cbd5cd64344d3
m7-common: Remove deprecated bnep services

Change-Id: I43e305b2d82b7c699a7207ede084037cf5f7a5f1
m7-common: overlay vzw-specific eri.xml

The mcc/mnc specific config.xml in values-xxx and xml-xxx were
apparently copied from Sprint. I see no reason they sould have been
included in the first place. This is re-affirmed by decompiling the
frameworks apks from stock.

Include more mcc/mnc eri overlays to correct the R(oaming) symbol in 3G.

Change-Id: I2b279cb03c28b7c2a580440a7456dee113338d3c
m7-common: Disable input filtering

* These devices don't need it, and it reduces latency

Change-Id: I6a342f1d52c78f213a517fa5e6951000e9742322
m7-common: Switch to DMIC Endfire for Speaker DMIC Endfire

* This is supposed to use DMIC4 on stock, but that appears to be
  horrible. Use DMIC Endfire setup instead.

Change-Id: Id4e583f58cee6bd8fcb1e1815f5c6b1e3664809f
m7-common: Use dual mic for Speaker DMIC Stereo

Change-Id: Ia269ba5df1b8cc3476d6f17c076ca5c0cb03d8b1
m7-common: show cdma auto mode on m7vzw

... when global roaming.

Change-Id: I28dd2cef4a18ebf4a4d191ef2c21fd1c017fd4c0
Revert "Revert "m7-common: use QCOM hardware keystore""

* Move QSEECOM lib as well.

This reverts commit 414a07a48c32be305ae7dd4b8eb57a69b51908da.

Change-Id: I61a426065a5781332d2e92fc943bea111eeb2880
m7-common: Update thermald configuration

Change-Id: I9638ef4b3747f6949f017e3df8e7cfafe5cad721