Reland of Android: Change camera fps range selection (patchset #1 id:1 of https://codereview.webrtc.org/2021233002/ )

Reason for revert:
Fixed gyp bug.

Original issue's description:
> Revert of Android: Change camera fps range selection (patchset #4 id:100001 of https://codereview.webrtc.org/2013413002/ )
>
> Reason for revert:
> Breaks chromium fyi:
> https://build.chromium.org/p/chromium.webrtc.fyi/builders/Mac%20Builder/builds/13565
> on step 'generate_build_files':
> gyp: /b/build/slave/Mac_Builder/build/src/third_party/build/android/test_runner.gypi not found
>
> Original issue's description:
> > Android: Change camera fps range selection
> >
> > This CL changes the logic in
> > CameraEnumerationAndroid.getClosestSupportedFramerateRange() to prefer
> > fps ranges with a low lower bound so the camera can adjust for
> > brightness conditions.
> >
> > To test the functionality of the fps range selection, JUnit tests are
> > added. This required a new target in api_tests.gyp. JUnit tests are
> > preferable over instrumentation tests
> > (libjingle_peerconnection_android_unittest) because they are faster and
> > simpler.
> >
> > R=kjellander@webrtc.org, sakal@webrtc.org
> >
> > Committed: https://crrev.com/b4ddb5c3d3706b1c02437f6a538576f3552ab908
> > Cr-Commit-Position: refs/heads/master@{#12964}
>
> TBR=sakal@webrtc.org,kjellander@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
>
> Committed: https://crrev.com/b3f208d0ba45f140272e3e705b5cdadc3c76514b
> Cr-Commit-Position: refs/heads/master@{#12966}

TBR=sakal@webrtc.org,kjellander@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.webrtc.org/2028583002
Cr-Commit-Position: refs/heads/master@{#12980}

webrtc/androidjunit/OWNERS

@@ -0,0 +1,2 @@
+magjed@webrtc.org
+sakal@webrtc.org

webrtc/androidjunit/src/org/webrtc/CameraEnumerationTest.java

@@ -0,0 +1,55 @@
+/*
+ *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+package org.webrtc;
+
+import static org.junit.Assert.assertEquals;
+import static org.webrtc.CameraEnumerationAndroid.getClosestSupportedFramerateRange;
+
+import org.webrtc.CameraEnumerationAndroid.CaptureFormat;
+import org.webrtc.CameraEnumerationAndroid.CaptureFormat.FramerateRange;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.annotation.Config;
+
+import java.util.Arrays;
+
+/**
+ * Tests for CameraEnumerationAndroid.
+ */
+@RunWith(RobolectricTestRunner.class)
+@Config(manifest = Config.NONE)
+public class CameraEnumerationTest {
+  @Test
+  public void testGetClosestSupportedFramerateRange() {
+    assertEquals(new FramerateRange(10000, 30000),
+        getClosestSupportedFramerateRange(
+            Arrays.asList(new FramerateRange(10000, 30000),
+                          new FramerateRange(30000, 30000)),
+            30 /* requestedFps */));
+
+    assertEquals(new FramerateRange(10000, 20000),
+        getClosestSupportedFramerateRange(
+            Arrays.asList(new FramerateRange(0, 30000),
+                          new FramerateRange(10000, 20000),
+                          new FramerateRange(14000, 16000),
+                          new FramerateRange(15000, 15000)),
+            15 /* requestedFps */));
+
+    assertEquals(new FramerateRange(10000, 20000),
+        getClosestSupportedFramerateRange(
+            Arrays.asList(new FramerateRange(15000, 15000),
+                          new FramerateRange(10000, 20000),
+                          new FramerateRange(10000, 30000)),
+            10 /* requestedFps */));
+  }
+}