Enable a 64-bit build of AOSP APK on 25 LTS (#4351)

These commits were manually cherry picked from the changes in
b/355499070.

b/376441619

starboard/android/arm64/platform_configuration/configuration.gni

@@ -17,3 +17,4 @@ import("//starboard/android/shared/platform_configuration/configuration.gni")
 android_abi = "arm64-v8a"
 arm_version = 8
 sabi_path = "//starboard/sabi/arm64/sabi-v$sb_api_version.json"
+sb_evergreen_compatible_package = true

starboard/android/arm64/toolchain/BUILD.gn

@@ -29,3 +29,19 @@ gcc_toolchain("target") {
     is_clang = true
   }
 }
+
+gcc_toolchain("native_target") {
+  prefix = rebase_path("$android_toolchain_path/bin", root_build_dir)
+  cc = "$prefix/aarch64-linux-android${android_ndk_api_level}-clang"
+  cxx = "$prefix/aarch64-linux-android${android_ndk_api_level}-clang++"
+  ld = cxx
+  readelf = "readelf"
+  ar = "ar"
+  nm = "nm"
+
+  toolchain_args = {
+    is_starboard = false
+    is_native_target_build = true
+    is_clang = true
+  }
+}

starboard/loader_app/BUILD.gn

@@ -48,7 +48,8 @@ if (sb_is_evergreen_compatible && sb_evergreen_compatible_package &&
     if (target_cpu == "arm" && arm_float_abi == "softfp") {
       sources = [ "$root_out_dir/../evergreen-$target_cpu-${arm_float_abi}_$build_type/content" ]
     } else if (target_cpu == "arm64") {
-      sources = [ "$root_out_dir/../evergreen-$target_cpu_$build_type/content" ]
+      sources =
+          [ "$root_out_dir/../evergreen-${target_cpu}_$build_type/content" ]
     } else {
       sources = []
     }
@@ -59,8 +60,9 @@ if (sb_is_evergreen_compatible && sb_evergreen_compatible_package &&
     if (target_cpu == "arm" && arm_float_abi == "softfp") {
       sources = [ "$root_out_dir/../evergreen-$target_cpu-${arm_float_abi}_$build_type/manifest.json" ]
     } else if (target_cpu == "arm64") {
-      sources =
-          [ "$root_out_dir/../evergreen-$target_cpu_$build_type/manifest.json" ]
+      sources = [
+        "$root_out_dir/../evergreen-${target_cpu}_$build_type/manifest.json",
+      ]
     } else {
       sources = []
     }

third_party/zlib/arm_features.c

@@ -85,10 +85,10 @@ static void _arm_check_features(void)
                    arm_cpu_enable_neon, arm_cpu_enable_pmull);
       SbLogFlush();
     }
-#elif defined(ARMV8_OS_ANDROID) && defined(__aarch64__)
+#elif defined(ARMV8_OS_ANDROID) && defined(__aarch64__) && !defined(NATIVE_TARGET_BUILD)
     uint64_t features = android_getCpuFeatures();
     arm_cpu_enable_pmull = !!(features & ANDROID_CPU_ARM64_FEATURE_PMULL);
-#elif defined(ARMV8_OS_ANDROID) /* aarch32 */
+#elif defined(ARMV8_OS_ANDROID) && !defined(NATIVE_TARGET_BUILD) /* aarch32 */
     uint64_t features = android_getCpuFeatures();
     arm_cpu_enable_crc32 = !!(features & ANDROID_CPU_ARM_FEATURE_CRC32);
     arm_cpu_enable_pmull = !!(features & ANDROID_CPU_ARM_FEATURE_PMULL);