pw_function: Define as cc_static_library

- Expose non-facade libraries as cc_static_library so they can be built
  on their own, following the new guidance at:
  https://pigweed.dev/pw_build_android/

Bug: 328503970
Test: presubmits in Android main pass
Change-Id: I651e89a09c166a0c2a7663498b12f3cf8110733c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/199092
Reviewed-by: Matthew Sedam <matthewsedam@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Carlos Chinchilla <cachinchilla@google.com>
Reviewed-by: Cindy Liu <hcindyl@google.com>

pw_chrono_stl/Android.bp

@@ -27,10 +27,14 @@ cc_library_static {
     host_supported: true,
     header_libs: [
         "pw_chrono",
+    ],
+    static_libs: [
         "pw_function",
     ],
     export_header_lib_headers: [
         "pw_chrono",
+    ],
+    export_static_lib_headers: [
         "pw_function",
     ],
 }

pw_digital_io/Android.bp

@@ -26,20 +26,20 @@ cc_library_static {
     ],
     header_libs: [
         "pw_assert",
-        "pw_function",
         "pw_result",
         "pw_toolchain",
     ],
     export_header_lib_headers: [
         "pw_assert",
-        "pw_function",
         "pw_result",
         "pw_toolchain",
     ],
     whole_static_libs: [
+        "pw_function",
         "pw_status",
     ],
     export_static_lib_headers: [
+        "pw_function",
         "pw_status",
     ],
     export_include_dirs: [

pw_function/Android.bp

@@ -16,7 +16,7 @@ package {
     default_applicable_licenses: ["external_pigweed_license"],
 }
 
-cc_library_headers {
+cc_library_static {
     name: "pw_function",
     cpp_std: "c++20",
     vendor_available: true,

pw_protobuf/Android.bp

@@ -28,7 +28,6 @@ cc_library_static {
         "fuchsia_sdk_lib_fit",
         "fuchsia_sdk_lib_stdcompat",
         "pw_assert",
-        "pw_function",
         "pw_log",
         "pw_polyfill",
         "pw_preprocessor",
@@ -38,7 +37,6 @@ cc_library_static {
     ],
     export_header_lib_headers: [
         "pw_assert",
-        "pw_function",
         "pw_log",
         "pw_preprocessor",
         "pw_result",
@@ -56,6 +54,7 @@ cc_library_static {
     static_libs: [
         "pw_bytes",
         "pw_containers",
+        "pw_function",
         "pw_status",
         "pw_stream",
         "pw_string",
@@ -64,6 +63,7 @@ cc_library_static {
     export_static_lib_headers: [
         "pw_bytes",
         "pw_containers",
+        "pw_function",
         "pw_status",
         "pw_stream",
         "pw_varint",

pw_rpc/Android.bp

@@ -114,7 +114,6 @@ cc_defaults {
         "fuchsia_sdk_lib_fit",
         "fuchsia_sdk_lib_stdcompat",
         "pw_assert",
-        "pw_function",
         "pw_log",
         "pw_polyfill",
         "pw_preprocessor",
@@ -128,7 +127,6 @@ cc_defaults {
         "fuchsia_sdk_lib_fit",
         "fuchsia_sdk_lib_stdcompat",
         "pw_assert",
-        "pw_function",
         "pw_log",
         "pw_polyfill",
         "pw_preprocessor",
@@ -141,6 +139,7 @@ cc_defaults {
     static_libs: [
         "pw_bytes",
         "pw_containers",
+        "pw_function",
         "pw_protobuf",
         "pw_status",
         "pw_stream",
@@ -151,6 +150,7 @@ cc_defaults {
     export_static_lib_headers: [
         "pw_bytes",
         "pw_containers",
+        "pw_function",
         "pw_protobuf",
         "pw_status",
         "pw_stream",

pw_rpc_transport/Android.bp

@@ -20,18 +20,14 @@ cc_library_headers {
     name: "pw_rpc_transport_rpc_transport",
     cpp_std: "c++20",
     export_include_dirs: ["public"],
-    header_libs: [
-        "pw_function",
-    ],
-    export_header_lib_headers: [
-        "pw_function",
-    ],
     static_libs: [
         "pw_bytes",
+        "pw_function",
         "pw_status",
     ],
     export_static_lib_headers: [
         "pw_bytes",
+        "pw_function",
         "pw_status",
     ],
     host_supported: true,

pw_thread/Android.bp

@@ -26,7 +26,6 @@ cc_defaults {
     header_libs: [
         "pw_chrono",
         "pw_thread_include_dirs",
-        "pw_function",
         "pw_preprocessor",
     ],
     export_header_lib_headers: [
@@ -34,6 +33,7 @@ cc_defaults {
         "pw_thread_include_dirs",
     ],
     static_libs: [
+        "pw_function",
         "pw_status",
     ],
     srcs: [