Build emulator images with emulator WiFi HAL

Use the new emulator WiFi HAL. This is specified by the
BOARD_WLAN_DEVICE setting. This also requires that the wifi HAL service
is included.

BUG: 74514143
Bug: 68338427
Test: run cts -m CtsIncidentHostTestCases -t
com.android.server.cts.BatteryStatsValidationTest#testWifiDownload
Change-Id: Ib59550b6cfba1e2e8686a5c805cd6b3913e8508e
(cherry picked from commit 23073c6ee33eca56f1ae0c45615b87ec9aec712e)
(cherry picked from commit 2d51c9b2bf0774ac46837a93181c83329e6fc662)