Android.bp: add vendor_available to IPA and camera static lib deps

The ninja-to-soong migration marked all libcamera shared libs as
soc_specific: true but omitted vendor_available: true from the static
libs they link against. This causes Soong to fail with "missing variant:
image:vendor" when the static libs are pulled in transitively by the
vendor APEX com.android.hardware.camera.libcamera.

Add vendor_available: true to the five affected cc_library_static modules.

Android.bp

@@ -172,6 +172,7 @@ cc_library_shared {
 
 cc_library_static {
     name: "libcamera-rpi_src_ipa_rpi_controller_librpi_ipa_controller_a",
+    vendor_available: true,
     srcs: [
         "src/ipa/rpi/controller/*.cpp",
         "src/ipa/rpi/controller/rpi/af.cpp",
@@ -217,6 +218,7 @@ cc_library_static {
 
 cc_library_static {
     name: "libcamera-rpi_src_ipa_rpi_common_librpi_ipa_common_a",
+    vendor_available: true,
     srcs: ["src/ipa/rpi/common/ipa_base.cpp"],
     cflags: [
         "-DLIBCAMERA_BASE_PRIVATE",
@@ -239,6 +241,7 @@ cc_library_static {
 
 cc_library_static {
     name: "libcamera-rpi_src_ipa_rpi_cam_helper_librpi_ipa_cam_helper_a",
+    vendor_available: true,
     srcs: [
         "src/ipa/rpi/cam_helper/*.cpp",
         "src/ipa/rpi/cam_helper/imx500_tensor_parser/imx500_tensor_parser.cpp",
@@ -264,6 +267,7 @@ cc_library_static {
 
 cc_library_static {
     name: "libcamera-rpi_src_ipa_libipa_libipa_a",
+    vendor_available: true,
     srcs: ["src/ipa/libipa/*.cpp"],
     cflags: [
         "-DLIBCAMERA_BASE_PRIVATE",
@@ -370,6 +374,7 @@ cc_library_shared {
 
 cc_library_static {
     name: "libcamera-rpi_src_android_libcamera_metadata_a",
+    vendor_available: true,
     srcs: ["src/android/metadata/camera_metadata.c"],
     cflags: ["-Wno-shadow"],
     local_include_dirs: [