Revert "Annotate @SystemApi on some WifiManager methods."
Revert "Annotate @SystemApi on some WifiManager methods."

This reverts commit 041bcc22bd21f84358e5b2102e3a919bcdd99b81.

Bug: 17134034
Change-Id: I1ebcdd9b4c56e5c93fd5667699c8971e8c6e5452
xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base