Point android_instrumentation_test's test runner to the vendored

deploy jar at @android_test_support//:instrumentation_test_runner alias to  @android_test_support//opensource:entry_point_deploy.jar

GITHUB: bazelbuild#903
RELNOTES: None.
PiperOrigin-RevId: 182310718

tools/android/BUILD.tools

@@ -258,6 +258,11 @@ alias(
     actual = "//third_party/java/jarjar:jarjar_bin",
 )
 
+alias(
+    name = "instrumentation_test_entry_point",
+    actual = "@android_test_support//:instrumentation_test_runner",
+)
+
 # This is the default binding of //external:android/sdk. If someone attempts to
 # build a rule that depends on //external:android/sdk without setting up
 # android_sdk_repository in their WORKSPACE, the genrule will fail with a