Auto merge of #14482 - mmatyas:android_workspace_fix, r=Manishearth

Fix Android packaging problem

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Fixes the cargo workspace issue when trying to package for Android.

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #14422.

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Cargo.toml

@@ -3,4 +3,5 @@ members = [
     "ports/cef",
     "ports/geckolib",
     "ports/servo",
+    "support/android/build-apk",
 ]