Update hwcomposer include paths

In preparation of new hwcomposer interface, updating
existing includes to include specific version.
Note: IComposerCommandBuffer.h was moved, renamed and clang
formated, but otherwise had no code changes.
Bug: 71513561
Test: compile

Change-Id: If34cb6f63012592a245708109590653ace7009f5
diff --git a/graphics/composer/2.1/default/Android.bp b/graphics/composer/2.1/default/Android.bp
index 140e50e..b46a1de 100644
--- a/graphics/composer/2.1/default/Android.bp
+++ b/graphics/composer/2.1/default/Android.bp
@@ -17,6 +17,9 @@
         "libsync",
         "libutils",
     ],
+    header_libs: [
+        "android.hardware.graphics.composer@2.1-command-buffer",
+    ],
 }
 
 cc_library_shared {
@@ -41,6 +44,9 @@
         "libhwc2on1adapter",
         "libhwc2onfbadapter",
     ],
+    header_libs: [
+        "android.hardware.graphics.composer@2.1-command-buffer",
+    ],
 }
 
 cc_binary {
@@ -65,10 +71,3 @@
         "libutils",
     ],
 }
-
-cc_library_static {
-    name: "libhwcomposer-command-buffer",
-    defaults: ["hidl_defaults"],
-    shared_libs: ["android.hardware.graphics.composer@2.1"],
-    export_include_dirs: ["."],
-}