Bring back cablev2_authenticator module with isolated splits

JNI is now supported in DFMs with isolated splits enabled, so should be
safe to bring back the cablev2_authenticator module.

Bug: 1145287
Change-Id: I8c8c748e244bac89c5edd61034ad3021c3fad7f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2569365Reviewed-by: Adam Langley <agl@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833011}

chrome/android/features/cablev2_authenticator/BUILD.gn

@@ -40,6 +40,7 @@ generate_jni("jni_headers") {
     "java/src/org/chromium/chrome/browser/webauth/authenticator/CableAuthenticator.java",
     "java/src/org/chromium/chrome/browser/webauth/authenticator/USBHandler.java",
   ]
+  split_name = "cablev2_authenticator"
 }
 
 android_resources("java_resources") {

chrome/android/modules/cablev2_authenticator/cablev2_authenticator_module.gni

@@ -5,9 +5,5 @@ cablev2_authenticator_module_desc = {
   native_deps =
       [ "//chrome/android/modules/cablev2_authenticator/internal:native" ]
   load_native_on_get_impl = true
-
-  # This module uses native->Java JNI calls, which isn't currently supported
-  # in isolated splits. The following line should be uncommented once it is.
-  #
-  # uses_split = "chrome"
+  uses_split = "chrome"
 }