[Android] Fix CommandLineFlags#ensureInitialized

--enable-features and --disable-features were being effectively
ignored.

Bug: None
Change-Id: Ie5eda21530d3eb04d13d10336e39ec0ad82a272e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5974133
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1375367}


CrOS-Libchrome-Original-Commit: 26c72d45738f004a9c74871a397483fb93e4b0e8

Author: Henrique Nakashima

base/test/android/javatests/src/org/chromium/base/test/util/CommandLineFlags.java

@@ -73,7 +73,7 @@ public static void ensureInitialized() {
             // Store features from initial command-line for proper merging later.
             CommandLine commandLine = CommandLine.getInstance();
             String origEnabledFeatures = commandLine.getSwitchValue(ENABLE_FEATURES, "");
-            String origDisabledFeatures = commandLine.getSwitchValue(ENABLE_FEATURES, "");
+            String origDisabledFeatures = commandLine.getSwitchValue(DISABLE_FEATURES, "");
             sOrigFeatures =
                     collectFeaturesFromFlags(
                             List.of(