telephony: Remove "managed roaming" feature

 * This feature shows a popup to ask the user if they want to scan for
   mobile networks if the current network is unavailable. It's confusing
   and overly aggressive, and there are other indicators when this
   happens anyway. Kill it.

Revert "Do not show roaming dialog if network scan is in progress."

This reverts commit 7935b65a4ecccf42004fbef389c58133d17704ca.

Revert "Phone(MSIM): Managed Roaming support for multisim"

This reverts commit 2b5ee374043b4f6460a1b29e72dd237b80877a79.

Conflicts:
	res/values/strings.xml

Change-Id: I10f973df18fc7de7f79f13b9f1509ed586e03688

Revert "Add Managed Roaming feature support."

This reverts commit 207dc957d761c2c7472c89db5b19e4ee66818d59.

Remove managed roaming translations

Change-Id: Ibd312162f897ceb7abd009b5587d3bf7319dd062

Conflicts:
	AndroidManifest.xml
Holoize multi-SIM call target selection dialog.

Change-Id: I3db399422133f90ac15e9b49a217c67fb1f2da94
Remove hard-coded CDMA roaming mode restrictions.

Prior to this, the CDMA roaming mode (from the "System select" setting) is
vetted against a hard-coded list of two acceptable values (CDMA_RM_HOME:0
and CDMA_RM_ANY:2).  This commit instead vets against the
cdma_system_select_values list, which contains those two values by default,
but may be overridden on a per-device basis.

For motivation, epicmtd in stock Gingerbread doesn't use CDMA_RM_ANY:2, but
values 5-8 to select between automatic domestic, international, both, and
no roaming.  Without this, roaming is unintentionally disabled anytime the
"Mobile networks" setting screen is opened.

From CM 10.2: I6611822822f32cd132a1794e7ca11bf5f751994d,
     CM 9:    I589c660fe3a1b9920cecfc7e6dc044f3f722fbb2.

Change-Id: Ib99fba45e9a85260ca6e3cebdecff988b4ed5547