Adding dist for aapt2_results

In the previous transition to Android.bp change(aosp/2935114), the
$(call dist-for-goals,aapt2_run_host_unit_tests, ...) was overlooked.
This change added `dist` for `aapt2_results` to fix this issue.

Bug: 322285259
Test: m -j aapt2_run_host_unit_tests dist;
      Then, check ./out/dist/gtest/aapt2_host_unit_tests_result_x86.xml
      and ./out/dist/gtest/aapt2_host_unit_tests_result_x86_64.xml
Change-Id: Ieaa67fef4a47b08fd97f3dc1810f4cd1933f155d
diff --git a/tools/aapt2/Android.bp b/tools/aapt2/Android.bp
index bca7797..dbac6ca 100644
--- a/tools/aapt2/Android.bp
+++ b/tools/aapt2/Android.bp
@@ -266,6 +266,23 @@
         "$(genDir)/aapt2_tests " +
         "--gtest_output=xml:$(out) " +
         ">/dev/null 2>&1 ; true",
+    dist: {
+        targets: ["aapt2_run_host_unit_tests"],
+        dir: "gtest",
+        dest: "aapt2_host_unit_tests_result.xml",
+    },
+    arch: {
+        x86: {
+            dist: {
+                suffix: "_x86",
+            },
+        },
+        x86_64: {
+            dist: {
+                suffix: "_x86_64",
+            },
+        },
+    },
 }
 
 phony_rule {