Fix error message for proguard_apply_dictionary.

RELNOTES: Fixed error message for proguard_apply_dictionary.
PiperOrigin-RevId: 193538106
diff --git a/src/main/java/com/google/devtools/build/lib/rules/android/AndroidBinary.java b/src/main/java/com/google/devtools/build/lib/rules/android/AndroidBinary.java
index 5c83c42..9c91ece 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/android/AndroidBinary.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/android/AndroidBinary.java
@@ -154,7 +154,7 @@
             .get(ProguardHelper.PROGUARD_SPECS, BuildType.LABEL_LIST)
             .isEmpty()) {
       ruleContext.throwWithAttributeError(
-          "proguard_apply_mapping",
+          "proguard_apply_dictionary",
           "'proguard_apply_dictionary' can only be used when 'proguard_specs' is also set");
     }