[Android] Add inspections settings for AndroidStudio

1. Add ChromiumInspections.xml that specifies Chromium-specific inspection
  profiles for AndroidStudio.
2. Update docs for importing ChromiumStyle.xml and ChromiumInspections.xml.

Bug: 620034
Change-Id: Icd6821142bc87fc2dcd458910330e61173dc48aa
Reviewed-on: https://chromium-review.googlesource.com/662785
Reviewed-by: Peter Wen <wnwen@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501931}

docs/android_studio.md

@@ -88,10 +88,13 @@ includes `R.java`).
     * Launch it with more RAM:
       `STUDIO_VM_OPTIONS=-Xmx2048m /opt/android-studio-stable/bin/studio-launcher.sh`
 * If you ever need to reset it: `rm -r ~/.AndroidStudio*/`
-* Import Android style settings:
+* Import Chromium-specific style and inspections settings:
     * Help -> Find Action -> "Code Style" (settings) -> Java ->
-      Manage -> Import -> select "Intellij IDEA code style XML" -> OK
-        * Select `tools/android/android_studio/ChromiumStyle.xml`
+      Scheme -> Import Scheme
+        * Select `tools/android/android_studio/ChromiumStyle.xml` -> OK
+    * Help -> Find Action -> "Inspections" (settings) ->
+      Profile -> Import profile
+        * Select `tools/android/android_studio/ChromiumInspections.xml` -> OK
 * Turn on automatic import:
     * Help -> Find Action -> "Auto Import"
         * Tick all the boxes under "Java" and change the dropdown to "All".

tools/android/android_studio/ChromiumInspections.xml

@@ -0,0 +1,6 @@
+<profile version="1.0">
+  <option name="myName" value="Chromium" />
+  <!-- We use asserts in Chromium. See https://chromium.googlesource.com/chromium/src/+/master/styleguide/java/java.md#Asserts -->
+  <inspection_tool class="AndroidLintAssert" enabled="false" level="WARNING" enabled_by_default="false" />
+  <inspection_tool class="AndroidLintRtlCompat" enabled="false" level="ERROR" enabled_by_default="false" />
+</profile>