Clarify frame rate as frames per second

Bug: 137287430
Test: n/a
Change-Id: Ibc2327fde50cbd86025842c4bebf4e26ffe42aa3
diff --git a/core/java/android/view/Surface.java b/core/java/android/view/Surface.java
index a6b7c33..78a080d 100644
--- a/core/java/android/view/Surface.java
+++ b/core/java/android/view/Surface.java
@@ -858,11 +858,12 @@
      * surface is consumed by something other than the system compositor, e.g. a media
      * codec, this call has no effect.
      *
-     * @param frameRate The intended frame rate of this surface. 0 is a special value that
-     * indicates the app will accept the system's choice for the display frame rate, which
-     * is the default behavior if this function isn't called. The frameRate param does
-     * *not* need to be a valid refresh rate for this device's display - e.g., it's fine
-     * to pass 30fps to a device that can only run the display at 60fps.
+     * @param frameRate The intended frame rate of this surface, in frames per second. 0
+     * is a special value that indicates the app will accept the system's choice for the
+     * display frame rate, which is the default behavior if this function isn't
+     * called. The frameRate param does *not* need to be a valid refresh rate for this
+     * device's display - e.g., it's fine to pass 30fps to a device that can only run the
+     * display at 60fps.
      */
     public void setFrameRate(@FloatRange(from = 0.0) float frameRate) {
         int error = nativeSetFrameRate(mNativeObject, frameRate);
diff --git a/core/java/android/view/SurfaceControl.java b/core/java/android/view/SurfaceControl.java
index f7b87cc..6487ed8 100644
--- a/core/java/android/view/SurfaceControl.java
+++ b/core/java/android/view/SurfaceControl.java
@@ -2800,12 +2800,12 @@
          * the system releases buffers back to the application.
          *
          * @param sc The SurfaceControl to specify the frame rate of.
-         * @param frameRate The intended frame rate for this surface. 0 is a special value that
-         *                  indicates the app will accept the system's choice for the display frame
-         *                  rate, which is the default behavior if this function isn't called. The
-         *                  frameRate param does *not* need to be a valid refresh rate for this
-         *                  device's display - e.g., it's fine to pass 30fps to a device that can
-         *                  only run the display at 60fps.
+         * @param frameRate The intended frame rate for this surface, in frames per second. 0 is a
+         *                  special value that indicates the app will accept the system's choice for
+         *                  the display frame rate, which is the default behavior if this function
+         *                  isn't called. The frameRate param does *not* need to be a valid refresh
+         *                  rate for this device's display - e.g., it's fine to pass 30fps to a
+         *                  device that can only run the display at 60fps.
          * @return This transaction object.
          */
         @NonNull