Specify tooling dependency for create_brick_ota

create_brick_ota relies on signapk for OTA package signing, hence
add relevant tools in dependency list.

Bug: 365701163

Change-Id: Ib414a468bc690ee35cc7cae7bc0d3062c89d0bbe
diff --git a/tools/releasetools/Android.bp b/tools/releasetools/Android.bp
index 806e192..8c71044 100644
--- a/tools/releasetools/Android.bp
+++ b/tools/releasetools/Android.bp
@@ -368,6 +368,9 @@
     libs: [
         "ota_utils_lib",
     ],
+    required: [
+        "signapk",
+    ],
 }
 
 python_binary_host {