Update CHANGELOG for libaom v3.4.0 (continued)

Bug: aomedia:3281
Change-Id: If434d027b9476e99b75790e7ac6e8c663a1b00d2

CHANGELOG

diff --git a/CHANGELOG b/CHANGELOG
index a0d89a5..3179441 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,11 +1,12 @@
-2022-06-02 v3.4.0
+2022-06-14 v3.4.0
   This release includes compression efficiency and perceptual quality
   improvements, speedup and memory optimizations, and some new features.
   There are no ABI or API breaking changes in this release.
 
   - New Features
     * New --dist-metric flag with "qm-psnr" value to use quantization
-      matrices in the distortion computation for RD search.
+      matrices in the distortion computation for RD search. The default
+      value is "psnr".
     * New command line option "--auto-intra-tools-off=1" to make
       all-intra encoding faster for high bit rate under
       "--deltaq-mode=3" mode.
@@ -15,6 +16,21 @@
       encoder. The presence of AOM_IMG_FMT_NV12 can be detected at
       compile time by checking if the macro AOM_HAVE_IMG_FMT_NV12 is
       defined.
+    * New codec controls for the encoder:
+      o AV1E_SET_AUTO_INTRA_TOOLS_OFF. Only in effect if
+        --deltaq-mode=3.
+      o AV1E_SET_RTC_EXTERNAL_RC
+      o AV1E_SET_FP_MT. Only supported if libaom is built with
+        -DCONFIG_FRAME_PARALLEL_ENCODE=1.
+      o AV1E_GET_TARGET_SEQ_LEVEL_IDX
+    * New key-value pairs for the key-value API:
+      o --auto-intra-tools-off=0 (default) or 1. Only in effect if
+        --deltaq-mode=3.
+      o --strict-level-conformance=0 (default) or 1
+      o --fp-mt=0 (default) or 1. Only supported if libaom is built
+        with -DCONFIG_FRAME_PARALLEL_ENCODE=1.
+    * New aomenc options (not supported by the key-value API):
+      o --nv12
 
   - Compression Efficiency Improvements
     * Correctly calculate SSE for high bitdepth in skip mode, 0.2% to