Android: Update lint target API

Lint target API should be updated when we support new android APIs.

Fixed: 999000
Bug: 999000
Change-Id: Ie724208e04689f2a4c90671f18a8599c258186f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2156747
Commit-Queue: Peter Wen <wnwen@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Auto-Submit: Peter Wen <wnwen@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760559}

build/config/android/config.gni

@@ -92,7 +92,7 @@ if (is_android || is_chromeos) {
     # Purposefully repeated so that downstream can change
     # default_android_sdk_root without changing lint version.
     default_lint_android_sdk_root = public_android_sdk_root
-    default_lint_android_sdk_version = 26
+    default_lint_android_sdk_version = 29
   }
 
   if (!defined(default_extras_android_sdk_root)) {

build/config/android/internal_rules.gni

@@ -854,7 +854,7 @@ if (enable_java_templates) {
 
       if (defined(invoker.lint_suppressions_file)) {
         lint_suppressions_file = invoker.lint_suppressions_file
-      } else if (!defined(lint_suppressions_file)) {
+      } else {
         lint_suppressions_file = "//build/android/lint/suppressions.xml"
       }
 
@@ -869,7 +869,7 @@ if (enable_java_templates) {
       _stamp_path = "$target_out_dir/$target_name/build.lint.stamp"
       _suppressions_file = lint_suppressions_file
       _platform_xml_path =
-          "${android_sdk_root}/platform-tools/api/api-versions.xml"
+          "$lint_android_sdk_root/platform-tools/api/api-versions.xml"
 
       script = "//build/android/gyp/lint.py"
       depfile = "$target_gen_dir/$target_name.d"
@@ -879,7 +879,7 @@ if (enable_java_templates) {
         _suppressions_file,
       ]
 
-      # _config_path and _stamp_path are also outputs, but do not list them
+      # _config_path and _result_path are also outputs, but do not list them
       # in order to avoid them being uploaded to swarming as part of isolates.
       # This happens as a side-effect of lint targets being listed as
       # "data_deps" in order to have them run concurrently with other targets.