Don't use java 9 InputStream::readAllBytes

Change-Id: I970910598f4ba5e3d9d2c9db40050fda7c285735
diff --git a/src/test/java/com/android/tools/r8/dexsplitter/R8FeatureSplitTest.java b/src/test/java/com/android/tools/r8/dexsplitter/R8FeatureSplitTest.java
index b8985a4..37b03d6 100644
--- a/src/test/java/com/android/tools/r8/dexsplitter/R8FeatureSplitTest.java
+++ b/src/test/java/com/android/tools/r8/dexsplitter/R8FeatureSplitTest.java
@@ -20,6 +20,7 @@
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import com.google.common.collect.ImmutableList;
+import com.google.common.io.ByteStreams;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.util.Collection;
@@ -141,7 +142,7 @@
       for (String nonJavaFile : nonJavaFiles) {
         ZipEntry entry = zipFile.getEntry(nonJavaFile);
         assertNotNull(entry);
-        String content = new String(zipFile.getInputStream(entry).readAllBytes());
+        String content = new String(ByteStreams.toByteArray(zipFile.getInputStream(entry)));
         assertEquals(content, nonJavaFile);
       }
     }
@@ -177,7 +178,7 @@
       for (String nonJavaFile : nonJavaFiles) {
         ZipEntry entry = zipFile.getEntry(nonJavaFile);
         assertNotNull(entry);
-        String content = new String(zipFile.getInputStream(entry).readAllBytes());
+        String content = new String(ByteStreams.toByteArray(zipFile.getInputStream(entry)));
         assertNotEquals(content, nonJavaFile);
       }
     }
diff --git a/src/test/java/com/android/tools/r8/dexsplitter/SplitterTestBase.java b/src/test/java/com/android/tools/r8/dexsplitter/SplitterTestBase.java
index b8420d7..fea2bce 100644
--- a/src/test/java/com/android/tools/r8/dexsplitter/SplitterTestBase.java
+++ b/src/test/java/com/android/tools/r8/dexsplitter/SplitterTestBase.java
@@ -21,6 +21,7 @@
 import com.android.tools.r8.utils.DescriptorUtils;
 import com.android.tools.r8.utils.ZipUtils;
 import com.google.common.collect.ImmutableList;
+import com.google.common.io.ByteStreams;
 import dalvik.system.PathClassLoader;
 import java.io.IOException;
 import java.net.MalformedURLException;
@@ -76,7 +77,7 @@
         ZipEntry next = inputStream.getNextEntry();
         while (next != null) {
           outputStream.putNextEntry(new ZipEntry(next.getName()));
-          outputStream.write(inputStream.readAllBytes());
+          outputStream.write(ByteStreams.toByteArray(inputStream));
           outputStream.closeEntry();
           next = inputStream.getNextEntry();
         }