[android] Convert linker tests to platform mode.

content/shell/android/BUILD.gn

Index: content/shell/android/BUILD.gn
diff --git a/content/shell/android/BUILD.gn b/content/shell/android/BUILD.gn
index bd907a9c7d2d21a7f1b70291038b1587221a07fc..27cc2f864c095398e67da6cc9cb6a956344bebce 100644
--- a/content/shell/android/BUILD.gn
+++ b/content/shell/android/BUILD.gn
@@ -182,7 +182,11 @@ if (current_cpu != "x64") {
     android_manifest_dep = ":chromium_linker_test_manifest"
   }
 
-  android_apk("chromium_linker_test_apk") {
+  _linker_test_apk_target_name = "chromium_linker_test_apk__apk"
+  _linker_test_apk_test_runner_target_name =
+      "chromium_linker_test_apk__test_runner_script"
+
+  android_apk(_linker_test_apk_target_name) {
     testonly = true
     deps = [
       ":content_shell_assets",
@@ -205,6 +209,21 @@ if (current_cpu != "x64") {
     enable_chromium_linker_tests = true
   }
 
+  test_runner_script(_linker_test_apk_test_runner_target_name) {
+    test_name = "chromium_linker_test_apk"
+    test_type = "linker"
+    apk_target = ":$_linker_test_apk_target_name"
+    ignore_all_data_deps = true
+  }
+
+  group("chromium_linker_test_apk") {
+    testonly = true
+    deps = [
+      ":$_linker_test_apk_target_name",
+      ":$_linker_test_apk_test_runner_target_name",
+    ]
+  }
+
   shared_library("linker_test") {
     testonly = true
     sources = [