Revert "Android: Re-enable lint"

This reverts commit a207e0dd.

Reason for revert: Lint error in downstream code.

Original change's description:
> Android: Re-enable lint
> 
> Android lint has been failing due to API level mismatch between lint and
> platform-tools (26 vs 25). This is causing new lint errors to be
> introduced. Ignore the API mismatch for now and re-enable lint so it at
> least catches all other issues.
> 
> API warning will be re-enabled after platform-tools is rolled.
> 
> Bug: 739746,746409
> Change-Id: I339560498544462732300c5030381a0c67f25f1b
> Reviewed-on: https://chromium-review.googlesource.com/577593
> Reviewed-by: Andrew Grieve <agrieve@chromium.org>
> Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
> Commit-Queue: Peter Wen <wnwen@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#487918}

TBR=mthiesse@chromium.org,wnwen@chromium.org,agrieve@chromium.org

Change-Id: I4857cf1ba5f10b009155693a803df922036f1878
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 739746, 746409
Reviewed-on: https://chromium-review.googlesource.com/578059Reviewed-by: Tien-Ren Chen <trchen@chromium.org>
Commit-Queue: Tien-Ren Chen <trchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487983}

build/android/lint/suppressions.xml

@@ -189,8 +189,6 @@ Still reading?
   <issue id="MissingVersion">
     <ignore path="AndroidManifest.xml"/>
   </issue>
-  <!-- TODO(crbug.com/739746): Remove once platform-tools is updated. -->
-  <issue id="NewApi" severity="ignore"/>
   <issue id="NewApi">
     <ignore regexp="Attribute `paddingStart` referenced here can result in a crash on some specific devices older than API 17"/>
     <ignore regexp="chrome/android/java/res/values-v17/styles.xml"/>
@@ -236,7 +234,6 @@ Still reading?
   </issue>
   <issue id="PackageManagerGetSignatures">
     <ignore regexp="chrome/android/webapk/libs/client/src/org/chromium/webapk/lib/client/WebApkValidator.java"/>
-    <ignore regexp="chrome/android/java/src/org/chromium/chrome/browser/customtabs/OriginVerifier.java"/>
   </issue>
   <issue id="PluralsCandidate" severity="Error">
     <ignore regexp="chrome/android/chrome_strings_grd.resources.zip/values-en-rGB/android_chrome_strings.xml"/>

build/config/android/config.gni

@@ -52,7 +52,7 @@ if (is_android) {
     # Purposefully repeated so that downstream can change
     # default_android_sdk_root without changing lint version.
     default_lint_android_sdk_root = "//third_party/android_tools/sdk"
-    default_lint_android_sdk_version = "26"
+    default_lint_android_sdk_version = "25"
   }
 
   if (!defined(default_extras_android_sdk_root)) {

chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java

@@ -117,9 +117,6 @@ public class VrShellDelegate implements ApplicationStatus.ActivityStateListener,
     private static VrShellDelegate sInstance;
     private static VrBroadcastReceiver sVrBroadcastReceiver;
     private static boolean sRegisteredDaydreamHook = false;
-
-    // TODO(crbug.com/746409): Remove this suppression after this lint error is fixed.
-    @SuppressWarnings("StaticFieldLeak")
     private static View sBlackOverlayView;
 
     private ChromeActivity mActivity;