Changes to public.bzl to support building on iOS with objc_library bazel target.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1639443002

Review URL: https://codereview.chromium.org/1639443002
diff --git a/public.bzl b/public.bzl
index 2af3a0f..349d991 100644
--- a/public.bzl
+++ b/public.bzl
@@ -70,6 +70,7 @@
     ],
     exclude = [
         # Exclude platform-dependent files.
+        "src/android/*",
         "src/codec/*",
         "src/device/xps/*",  # Windows-only. Move to ports?
         "src/doc/*_XPS.cpp",  # Windows-only. Move to ports?
@@ -118,6 +119,7 @@
 # Platform-dependent SRCS for google3-default platform.
 BASE_SRCS_UNIX = struct(
     include = [
+        "src/android/*",
         "src/codec/*",
         "src/fonts/SkFontMgr_fontconfig.cpp",
         "src/images/*",
@@ -168,6 +170,7 @@
 # Platform-dependent SRCS for google3-default Android.
 BASE_SRCS_ANDROID = struct(
     include = [
+        "src/android/*",
         "src/codec/*",
         "src/images/*",
         # TODO(benjaminwagner): Figure out how to compile with EGL.
@@ -232,8 +235,8 @@
         "src/opts/*avx*",
         "src/opts/*x86*",
         "src/opts/SkBitmapProcState_opts_none.cpp",
-        "src/opts/SkBlitMask_opts_none.cpp",
-        "src/opts/SkBlitRow_opts_none.cpp",
+        "src/opts/SkBlitMask_opts_arm*.cpp",
+        "src/opts/SkBlitRow_opts_arm*.cpp",
         "src/ports/*android*",
         "src/ports/*chromium*",
         "src/ports/*fontconfig*",
@@ -294,6 +297,7 @@
 BASE_HDRS = struct(
     include = [
         "include/**/*.h",
+        "src/utils/SkWhitelistChecksums.cpp",
     ],
     exclude = [
         "include/private/**/*",
@@ -487,6 +491,7 @@
 DEFINES_IOS = [
     "SK_BUILD_FOR_IOS",
     "SK_IGNORE_ETC1_SUPPORT",
+    "SKNX_NO_SIMD",
 ]
 
 DEFINES_ALL = [