Add android.provider.Telephony to public API.

Add directory containing android/provider/Telephony.java to build.
Add unhidden Telephony fields and classes to api/current.txt.

Bug: 10653081
Change-Id: Ib4ba66e09be5320d35257fcf481db58f840fdc53
diff --git a/Android.mk b/Android.mk
index 14d1a02..4dfd021 100644
--- a/Android.mk
+++ b/Android.mk
@@ -432,6 +432,7 @@
 
 non_base_dirs := \
 	../../external/apache-http/src/org/apache/http \
+	../opt/telephony/src/java/android/provider \
 	../opt/telephony/src/java/android/telephony \
 	../opt/telephony/src/java/android/telephony/gsm \
 	../opt/net/voip/src/java/android/net/rtp \