Add support for WiFi in emulator

Add required SELinux permissions to run services required for WiFi and
network namespaces. Add required executables and files required to run
WiFi services such as hostapd to create an access point and
wpa_supplicant to connect to it.

BUG: 74514143
Test: Build emulator image and manually verify WiFi functionality
Change-Id: I38461b878abcaae842b4656dea82792e23100174
(cherry picked from commit 21c5c3dcf91b1be71abe8618e2eb31529438e325)
(cherry picked from commit 68a36140f7a3a766b8adc16cd85c2f0c81bfb44b)
(cherry picked from commit e6dab593b8eebccb1e6311e626c8aca943ba6933)