Remove stale Android NDK and references [2/2]

Now that chromium/base has rolled and switched the android_ndk_root to
the new android_toolchain directory, remove the stale Android NDK. Fix
roller scripts to no longer roll Android NDK and Android blueprint
generation can remove references to the removed sources.

Bug: chromium:1448383
Test: Verified build of ANGLE.
Change-Id: Iba8bfd8be9fd6bfb4f75f5d3a273411bd11f6b5e
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4585389
Auto-Submit: Prashanth Swaminathan <prashanthsw@google.com>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>

DEPS

@@ -277,11 +277,6 @@ deps = {
     'condition': 'checkout_android and not build_with_chromium',
   },
 
-  'third_party/android_ndk': {
-    'url': '{chromium_git}/android_ndk.git@310956bd122ec2b96049f8d7398de6b717f3452e',
-    'condition': 'checkout_android and not build_with_chromium',
-  },
-
   'third_party/android_toolchain': {
       'packages': [
             {

scripts/generate_android_bp.py

@@ -210,7 +210,6 @@ third_party_target_allowlist = [
 include_blocklist = [
     '//buildtools/third_party/libc++/',
     '//out/Android/gen/third_party/vulkan-deps/glslang/src/include/',
-    '//third_party/android_ndk/sources/android/cpufeatures/',
     '//third_party/zlib/',
     '//third_party/zlib/google/',
 ]