Add file_context for telephonymodules APEX

Test: Build
Bug: 255736341
Ignore-AOSP-First: Yet to merge for AOSP
Change-Id: I2e511c4096d117a4dda271bcf235ac7c277f2c33
diff --git a/apex/com.android.telephonymodules-file_contexts b/apex/com.android.telephonymodules-file_contexts
new file mode 100644
index 0000000..4cee48b
--- /dev/null
+++ b/apex/com.android.telephonymodules-file_contexts
@@ -0,0 +1 @@
+(/.*)?                  u:object_r:system_file:s0