Add case sensitive sort to AccessPoint compareTo.

If APs differ only in case, further compare by case.

Bug: b/36719423
Test: runtest --path
frameworks/base/packages/SettingsLib/tests/integ/src/com/android/settingslib/wifi/AccessPointTest.java

Change-Id: Ic36a2221a668fa59230bb0ddbee2055776d2dc44
2 files changed