Create telephony apex.

Test: m com.android.telephony && adb install com.android.telephony.apex
Bug: 145555313
Change-Id: I0aa28cd05af937b2af86a1ed352e8b41b64e2fdc
diff --git a/apex/com.android.telephony-file_contexts b/apex/com.android.telephony-file_contexts
new file mode 100644
index 0000000..f3a65d4
--- /dev/null
+++ b/apex/com.android.telephony-file_contexts
@@ -0,0 +1 @@
+(/.*)?                u:object_r:system_file:s0