nativewindow: Misc. improvements for AHardwareBuffer Rust wrapper

Changes include:

  - Rename AHardwareBuffer to HardwareBuffer
  - Expose AHardwareBuffer as a raw pointer type
  - Making HardwareBuffer Send
  - HardwareBuffer now derives Debug, PartialEq and Eq
  - Use NonNull instead of a *mut pointer
  - Adding an into_raw function to match from_raw
  - Adding a Clone impl that acquires a ref

Bug: 296449936, 296100790
Test: atest libnativewindow_rs-internal_test
Change-Id: Iaf916fabe49190f47abd1a9ed34afdb76fd20e40
diff --git a/libs/bufferstreams/rust/src/lib.rs b/libs/bufferstreams/rust/src/lib.rs
index 87f3104..5964281 100644
--- a/libs/bufferstreams/rust/src/lib.rs
+++ b/libs/bufferstreams/rust/src/lib.rs
@@ -159,7 +159,7 @@
 /// Struct used to contain the buffer.
 pub struct Frame {
     /// A handle to the C buffer interface.
-    pub buffer: AHardwareBuffer,
+    pub buffer: HardwareBuffer,
     /// The time at which the buffer was dispatched.
     pub present_time: Instant,
     /// A fence used for reading/writing safely.
diff --git a/libs/bufferstreams/rust/src/stream_config.rs b/libs/bufferstreams/rust/src/stream_config.rs
index d0c621b..454bdf1 100644
--- a/libs/bufferstreams/rust/src/stream_config.rs
+++ b/libs/bufferstreams/rust/src/stream_config.rs
@@ -33,9 +33,9 @@
 }
 
 impl StreamConfig {
-    /// Tries to create a new AHardwareBuffer from settings in a [StreamConfig].
-    pub fn create_hardware_buffer(&self) -> Option<AHardwareBuffer> {
-        AHardwareBuffer::new(self.width, self.height, self.layers, self.format, self.usage)
+    /// Tries to create a new HardwareBuffer from settings in a [StreamConfig].
+    pub fn create_hardware_buffer(&self) -> Option<HardwareBuffer> {
+        HardwareBuffer::new(self.width, self.height, self.layers, self.format, self.usage)
     }
 }