android/apps: Add CanvasProof App;

platform_tools/android/apps/canvasproof/build.gradle

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+apply plugin: 'com.android.application'
+android {
+    compileSdkVersion 19
+    buildToolsVersion "22.0.1"
+    defaultConfig {
+        applicationId "org.skia.canvasproof"
+        minSdkVersion 9
+        targetSdkVersion 19
+        versionCode 1
+        versionName "1.0"
+        signingConfig signingConfigs.debug
+    }
+    sourceSets.main.jni.srcDirs = [] //disable automatic ndk-build call
+    sourceSets.main.jniLibs.srcDir "src/main/libs"
+    productFlavors { arm {}; arm64 {}; x86 {}; x86_64 {}; mips {}; mips64 {}; }
+    applicationVariants.all{ variant ->
+        def buildNativeLib = task("${variant.name}_NativeLib", type:Exec) {
+            workingDir '../../../..' // top-level skia directory
+            commandLine constructBuildCommand(variant, "CopyCanvasProofDeps").split()
+            environment PATH: getPathWithDepotTools()
+            environment ANDROID_SDK_ROOT: getSDKPath()
+        }
+        buildNativeLib.onlyIf { !project.hasProperty("suppressNativeBuild") }
+        TaskCollection<Task> assembleTask
+        assembleTask = project.tasks.matching {
+            it.name.contains("assemble") &&
+                    it.name.toLowerCase().endsWith(variant.name.toLowerCase())
+        }
+        assembleTask.getAt(0).dependsOn buildNativeLib
+    }
+}