Android: Remove BoringSSL guard

BoringSSL is the only supported version of SSL, so remove this guard so
we can continue to compile when the flavor.mk is removed.

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

wpa_supplicant/Android.mk

@@ -1596,9 +1596,7 @@ endif
 
 # With BoringSSL we need libkeystore-engine in order to provide access to
 # keystore keys.
-ifneq (,$(wildcard external/boringssl/flavor.mk))
 LOCAL_SHARED_LIBRARIES += libkeystore-engine
-endif
 
 ifdef CONFIG_DRIVER_NL80211
 ifneq ($(wildcard external/libnl),)