Introduce new configs to support force landscape mode

1.Introduce new config "config_supportForceLandscapeMode" to enable
force landscape mode, this config default is false.
2.Introduce new config "config_forceLandscapeRotation" to configure
the roation degree when force landscape mode enabled, A value of -1
means no change by default.

Change-Id: I53b2f3212fc83dfc3b13fd01951e7c72a5064c52
CRs-Fixed: 2913472
3 files changed