Expose extent_ranges for libsnapshot to use in resolving merge sequences.

Bug: 162274240
Test: builds
Change-Id: If8a1bbf99f9195d69b375021b59a7213935924b9
diff --git a/Android.bp b/Android.bp
index b6ee476..a2e4ba0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -469,6 +469,20 @@
 }
 
 cc_library_static {
+    name: "libpayload_extent_ranges",
+    defaults: [
+        "ue_defaults",
+    ],
+    host_supported: true,
+    srcs: [
+        "payload_generator/extent_ranges.cc",
+    ],
+    static_libs: [
+        "update_metadata-protos",
+    ],
+}
+
+cc_library_static {
     name: "libpayload_generator",
     defaults: [
         "ue_defaults",
@@ -737,4 +751,5 @@
     apex_available: [
         "com.android.gki.*",
     ],
+    host_supported: true,
 }