Add resources.pb to the apex bundle

The file was missing.

Bug: 117295826
Test: tapas com.android.runtime.debug; m dist
$ unzip -l com.android.runtime.debug-base.zip
Archive:  com.android.runtime.debug-base.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
 29614080  1980-01-01 09:00   apex/armeabi-v7a.img
       52  1980-01-01 09:00   root/manifest.json
      379  1980-01-01 09:00   manifest/AndroidManifest.xml
       59  1980-01-01 09:00   resources.pb
---------                     -------
 29614570                     4 files

Change-Id: I916ad5ba479c952a106b055c0e71e7e6556b6101
diff --git a/apex/apex.go b/apex/apex.go
index aad7c65..c0dfdd8 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -69,7 +69,11 @@
 		})
 
 	apexBundleRule = pctx.StaticRule("apexBundleRule", blueprint.RuleParams{
-		Command:     `${zip2zip} -i $in -o $out image.img:apex/${abi}.img manifest.json:root/manifest.json AndroidManifest.xml:manifest/AndroidManifest.xml`,
+		Command: `${zip2zip} -i $in -o $out ` +
+			`image.img:apex/${abi}.img ` +
+			`manifest.json:root/manifest.json ` +
+			`AndroidManifest.xml:manifest/AndroidManifest.xml ` +
+			`resources.pb`,
 		CommandDeps: []string{"${zip2zip}"},
 		Description: "app bundle",
 	}, "abi")