Convert ColorLong in native code in Paint

Bug: 127580253
Test: CtsGraphicsTestCases
Perf: systrace

Follow on to I0b42c17159b290868a6bed7b90da096995504c4d, which did this
for other classes. I expect this to be more efficient due to passing
fewer JNI parameters, which appears to be the case based on the systrace
data for setColor(@ColorLong):

Duration:
(w/o this change)       (w/ this change)
avg:	0.010 ms        0.005 ms
max:	9.130 ms        0.239 ms
min:	0.002 ms        0.002 ms
std:	0.052 ms        0.004 ms

The average is twice as fast, the max is significantly shorter, and the
standard deviation is much smaller as well.

Change-Id: I241824bf2a934746df93da1063b14f3080486cb5

core/jni/android/graphics/Paint.cpp

@@ -724,9 +724,9 @@ namespace PaintGlue {
     }
 
     static void setColorLong(jlong paintHandle, jlong colorSpaceHandle,
-            jfloat r, jfloat g, jfloat b, jfloat a) {
+            jlong colorLong) {
+        SkColor4f color = GraphicsJNI::convertColorLong(colorLong);
         sk_sp<SkColorSpace> cs = GraphicsJNI::getNativeColorSpace(colorSpaceHandle);
-        SkColor4f color = SkColor4f{r, g, b, a};
         reinterpret_cast<Paint*>(paintHandle)->setColor4f(color, cs.get());
     }
 
@@ -995,9 +995,9 @@ namespace PaintGlue {
 
     static void setShadowLayer(jlong paintHandle, jfloat radius,
                                jfloat dx, jfloat dy, jlong colorSpaceHandle,
-                               jfloat r, jfloat g, jfloat b, jfloat a) {
+                               jlong colorLong) {
+        SkColor4f color = GraphicsJNI::convertColorLong(colorLong);
         sk_sp<SkColorSpace> cs = GraphicsJNI::getNativeColorSpace(colorSpaceHandle);
-        SkColor4f color = SkColor4f{r, g, b, a};
 
         Paint* paint = reinterpret_cast<Paint*>(paintHandle);
         if (radius <= 0) {
@@ -1087,7 +1087,7 @@ static const JNINativeMethod methods[] = {
     {"nGetStyle","(J)I", (void*) PaintGlue::getStyle},
     {"nSetStyle","(JI)V", (void*) PaintGlue::setStyle},
     {"nSetColor","(JI)V", (void*) PaintGlue::setColor},
-    {"nSetColor","(JJFFFF)V", (void*) PaintGlue::setColorLong},
+    {"nSetColor","(JJJ)V", (void*) PaintGlue::setColorLong},
     {"nSetAlpha","(JI)V", (void*) PaintGlue::setAlpha},
     {"nGetStrokeWidth","(J)F", (void*) PaintGlue::getStrokeWidth},
     {"nSetStrokeWidth","(JF)V", (void*) PaintGlue::setStrokeWidth},
@@ -1130,7 +1130,7 @@ static const JNINativeMethod methods[] = {
     {"nGetUnderlineThickness","(J)F", (void*) PaintGlue::getUnderlineThickness},
     {"nGetStrikeThruPosition","(J)F", (void*) PaintGlue::getStrikeThruPosition},
     {"nGetStrikeThruThickness","(J)F", (void*) PaintGlue::getStrikeThruThickness},
-    {"nSetShadowLayer", "(JFFFJFFFF)V", (void*)PaintGlue::setShadowLayer},
+    {"nSetShadowLayer", "(JFFFJJ)V", (void*)PaintGlue::setShadowLayer},
     {"nHasShadowLayer", "(J)Z", (void*)PaintGlue::hasShadowLayer},
     {"nEqualsForTextMeasurement", "(JJ)Z", (void*)PaintGlue::equalsForTextMeasurement},
 };

graphics/java/android/graphics/Paint.java

@@ -1066,12 +1066,8 @@ public class Paint {
      */
     public void setColor(@ColorLong long color) {
         ColorSpace cs = Color.colorSpace(color);
-        float r = Color.red(color);
-        float g = Color.green(color);
-        float b = Color.blue(color);
-        float a = Color.alpha(color);
 
-        nSetColor(mNativePaint, cs.getNativeInstance(), r, g, b, a);
+        nSetColor(mNativePaint, cs.getNativeInstance(), color);
         mColor = color;
     }
 
@@ -1501,11 +1497,7 @@ public class Paint {
      */
     public void setShadowLayer(float radius, float dx, float dy, @ColorLong long shadowColor) {
         ColorSpace cs = Color.colorSpace(shadowColor);
-        float r = Color.red(shadowColor);
-        float g = Color.green(shadowColor);
-        float b = Color.blue(shadowColor);
-        float a = Color.alpha(shadowColor);
-        nSetShadowLayer(mNativePaint, radius, dx, dy, cs.getNativeInstance(), r, g, b, a);
+        nSetShadowLayer(mNativePaint, radius, dx, dy, cs.getNativeInstance(), shadowColor);
 
         mShadowLayerRadius = radius;
         mShadowLayerDx = dx;
@@ -1533,6 +1525,7 @@ public class Paint {
     /**
      * Returns the blur radius of the shadow layer.
      * @see #setShadowLayer(float,float,float,int)
+     * @see #setShadowLayer(float,float,float,long)
      */
     public float getShadowLayerRadius() {
         return mShadowLayerRadius;
@@ -1541,6 +1534,7 @@ public class Paint {
     /**
      * Returns the x offset of the shadow layer.
      * @see #setShadowLayer(float,float,float,int)
+     * @see #setShadowLayer(float,float,float,long)
      */
     public float getShadowLayerDx() {
         return mShadowLayerDx;
@@ -1549,6 +1543,7 @@ public class Paint {
     /**
      * Returns the y offset of the shadow layer.
      * @see #setShadowLayer(float,float,float,int)
+     * @see #setShadowLayer(float,float,float,long)
      */
     public float getShadowLayerDy() {
         return mShadowLayerDy;
@@ -3138,7 +3133,7 @@ public class Paint {
     @CriticalNative
     private static native void nSetShadowLayer(long paintPtr,
             float radius, float dx, float dy, long colorSpaceHandle,
-            float r, float g, float b, float a);
+            @ColorLong long shadowColor);
     @CriticalNative
     private static native boolean nHasShadowLayer(long paintPtr);
     @CriticalNative
@@ -3191,7 +3186,7 @@ public class Paint {
     private static native void nSetFilterBitmap(long paintPtr, boolean filter);
     @CriticalNative
     private static native void nSetColor(long paintPtr, long colorSpaceHandle,
-            float r, float g, float b, float a);
+            @ColorLong long color);
     @CriticalNative
     private static native void nSetColor(long paintPtr, @ColorInt int color);
     @CriticalNative