Pass Bitmap's native instance to JNI where feasible

Test: CtsGraphicsTestCases, CtsUiRenderingTestCases,
      CtsRenderscriptTestCases

This is significantly faster than passing the Java object down and then
calling a JNI method to retrieve the pointer. See
https://buganizer.corp.google.com/issues/16656908#comment19

In some cases this changes what used to be native crashes (due to
android::BitmapWrapper:assertValid's LOG_ALWAYS_FATAL_IF) into
NullPointerExceptions (if a caller used a null Bitmap).

In addition:
- Remove unnecessary JNIEnv param from toBitmap(jlong)
- Change instances of toBitmap(JNIEnv*, jobject) to the above
- Replace calls to GraphicsJNI::getSkBitmap() to inline calls to
  toBitmap/getSkBitmap
- make Canvas#nInitRaster @FastNative (FIXME: Could these be
  @CriticalNative?)

Change-Id: I6194097be1b6e6952eba70e1e7052a5a250eed93

graphics/java/android/graphics/BitmapFactory.java

@@ -464,6 +464,17 @@ public class BitmapFactory {
             }
         }
 
+        /**
+         *  Helper for passing inBitmap's native pointer to native.
+         */
+        static long nativeInBitmap(Options opts) {
+            if (opts == null || opts.inBitmap == null) {
+                return 0;
+            }
+
+            return opts.inBitmap.getNativeInstance();
+        }
+
         /**
          *  Helper for passing SkColorSpace pointer to native.
          *
@@ -652,6 +663,7 @@ public class BitmapFactory {
         Trace.traceBegin(Trace.TRACE_TAG_GRAPHICS, "decodeBitmap");
         try {
             bm = nativeDecodeByteArray(data, offset, length, opts,
+                    Options.nativeInBitmap(opts),
                     Options.nativeColorSpace(opts));
 
             if (bm == null && opts != null && opts.inBitmap != null) {
@@ -747,7 +759,8 @@ public class BitmapFactory {
         try {
             if (is instanceof AssetManager.AssetInputStream) {
                 final long asset = ((AssetManager.AssetInputStream) is).getNativeAsset();
-                bm = nativeDecodeAsset(asset, outPadding, opts, Options.nativeColorSpace(opts));
+                bm = nativeDecodeAsset(asset, outPadding, opts, Options.nativeInBitmap(opts),
+                    Options.nativeColorSpace(opts));
             } else {
                 bm = decodeStreamInternal(is, outPadding, opts);
             }
@@ -775,6 +788,7 @@ public class BitmapFactory {
         if (opts != null) tempStorage = opts.inTempStorage;
         if (tempStorage == null) tempStorage = new byte[DECODE_BUFFER_SIZE];
         return nativeDecodeStream(is, tempStorage, outPadding, opts,
+                Options.nativeInBitmap(opts),
                 Options.nativeColorSpace(opts));
     }
 
@@ -819,6 +833,7 @@ public class BitmapFactory {
         try {
             if (nativeIsSeekable(fd)) {
                 bm = nativeDecodeFileDescriptor(fd, outPadding, opts,
+                        Options.nativeInBitmap(opts),
                         Options.nativeColorSpace(opts));
             } else {
                 FileInputStream fis = new FileInputStream(fd);
@@ -856,15 +871,15 @@ public class BitmapFactory {
 
     @UnsupportedAppUsage
     private static native Bitmap nativeDecodeStream(InputStream is, byte[] storage,
-            Rect padding, Options opts, long colorSpaceHandle);
+            Rect padding, Options opts, long inBitmapHandle, long colorSpaceHandle);
     @UnsupportedAppUsage
     private static native Bitmap nativeDecodeFileDescriptor(FileDescriptor fd,
-            Rect padding, Options opts, long colorSpaceHandle);
+            Rect padding, Options opts, long inBitmapHandle, long colorSpaceHandle);
     @UnsupportedAppUsage
     private static native Bitmap nativeDecodeAsset(long nativeAsset, Rect padding, Options opts,
-            long colorSpaceHandle);
+            long inBitmapHandle, long colorSpaceHandle);
     @UnsupportedAppUsage
     private static native Bitmap nativeDecodeByteArray(byte[] data, int offset,
-            int length, Options opts, long colorSpaceHandle);
+            int length, Options opts, long inBitmapHandle, long colorSpaceHandle);
     private static native boolean nativeIsSeekable(FileDescriptor fd);
 }