Wifi: Use bss->age identifier for wifi scan results

This value will be used as "timestamp" and Google Play Services
uses this value for identifying sane wifi scan items.

The current timestamp (tsf=) has a different meaning, which causes
the Google Location Resolver to ignore all wifi scan entries and
therefore no location can be resolved.

This solution is already done on batched result parsing, but
missing on the traditional scans.

Change-Id: I36a1aeb666379e6a010298f09161e971012db83f
Wifi: Fix 2 ip addresses issue

Invoking the function clearInterfaceAddresses to clear
the initial IP first when change the "IP Settings"
for the select AP.

Change-Id: I38f6614e66cc3cf8d84e03c19d2d4badb1b16108
CRs-Fixed: 683307
Connectivity: Set TCP delayed ACK and User Configuration Flag

Provide a Mechanism to set tcp delayed ack settings from
Connectivity Service. The tcp_use_userconfig flag is set to
override the default tcp delayed ack configuration in tcp stack.
tcp_use_userconfig flag is reset when the TCP stack is required
to use default delayed ack settings. Currently the delayed ack
settings are overridden for Wifi and LTE networks only. Other
network types continue to use default delayed ack settings

Change-Id: I282ef0f6b6278b6efcef3870242974f7ee93e508
CRs-Fixed: 628139

Conflicts:
	services/java/com/android/server/ConnectivityService.java