Generate @removed DEX API signatures

CL I8fe27e8c03334f9c90204db1e69447de65a06a38 adds support to generate
a list of all @removed DEX API signatures. Amend the public API build
rule to produce this file.

Bug: 78182899
Test: make
Change-Id: Iba8869ce6e4f401a8e420ad83ab459d25bbbaae0
diff --git a/Android.bp b/Android.bp
index 97290b1..5bdfc87 100644
--- a/Android.bp
+++ b/Android.bp
@@ -924,6 +924,7 @@
     private_api_filename: "private.txt",
     private_dex_api_filename: "private-dex.txt",
     removed_api_filename: "removed.txt",
+    removed_dex_api_filename: "removed-dex.txt",
     args: framework_docs_args + " -referenceonly -nodocs",
 }