build & ci: update to NDK r27c API level 29

Update to the latest LTS version NDK r27c (27.2.12479018),
the previous NDK are unsupported by Google, see:
https://developer.android.com/ndk/downloads

A build with NDK r27c and API level < 29 returns this error:
"executable's TLS segment is underaligned: alignment is 8 (skew 0), needs to be at least 64 for ARM64 Bionic"

Update the API level to 29 to use the native ELF LTS and avoid the error:
https://android.googlesource.com/platform/bionic/+/HEAD/docs/elf-tls.md
https://android.googlesource.com/platform/bionic/+/HEAD/android-changes-for-ndk-developers.md#elf-tls-available-for-api-level-29

A dynamic link build of Stockfish uses these libraries:

ldd stockfish-android-armv8-dynamic-api35
        libm.so => /system/lib64/libm.so
        libdl.so => /system/lib64/libdl.so
        libc.so => /system/lib64/libc.so
        ld-android.so => /system/lib64/ld-android.so

ld-android.so : the dynamic linker used by Android (on Linux is named ld-linux.so),
                responsible for loading and linking shared libraries into an executable at runtime.
libdl.so      : interface/library layer that provides function for dynamic loading,
                relies on the underlying functionality provided by the dynamic linker
libm.so       : math library for Android
libc.so       : standard C library for Android

References:
Doc for native (C/C++) API
https://developer.android.com/ndk/guides/stable_apis

C libraries (libc, libm, libdl):
https://developer.android.com/ndk/guides/stable_apis#c_library

Bionic changes with API levels:
https://android.googlesource.com/platform/bionic/+/HEAD/docs/status.md

NDK r27c build system:
https://android.googlesource.com/platform/ndk/+/ndk-r27-release/docs/BuildSystemMaintainers.md

CI: Update to NDK r27c (27.2.12479018), the default version in GitHub runner,
to switch to a recent clang 18.

A PGO build requires static linking, because the NDK doesn't ship
the Android loaders (linker/linker64), see:
https://groups.google.com/g/android-ndk/c/3Ep6zD3xxSY

The API level should not be an issue when distributing a static build,
use the API 29, the oldest one not affected by the LTS alignement issue.

closes https://github.com/official-stockfish/Stockfish/pull/6081

No functional change

.github/workflows/arm_compilation.yml

@@ -38,7 +38,7 @@ jobs:
         if: runner.os == 'Linux'
         run: |
           if [ $COMP == ndk ]; then
-            NDKV="21.4.7075529"
+            NDKV="27.2.12479018"
             ANDROID_ROOT=/usr/local/lib/android
             ANDROID_SDK_ROOT=$ANDROID_ROOT/sdk
             SDKMANAGER=$ANDROID_SDK_ROOT/cmdline-tools/latest/bin/sdkmanager

.github/workflows/tests.yml

@@ -29,13 +29,13 @@ jobs:
             shell: bash
           - name: Android NDK aarch64
             os: ubuntu-22.04
-            compiler: aarch64-linux-android21-clang++
+            compiler: aarch64-linux-android29-clang++
             comp: ndk
             run_armv8_tests: true
             shell: bash
           - name: Android NDK arm
             os: ubuntu-22.04
-            compiler: armv7a-linux-androideabi21-clang++
+            compiler: armv7a-linux-androideabi29-clang++
             comp: ndk
             run_armv7_tests: true
             shell: bash
@@ -126,7 +126,7 @@ jobs:
         if: runner.os == 'Linux'
         run: |
           if [ $COMP == ndk ]; then
-            NDKV="21.4.7075529"
+            NDKV="27.2.12479018"
             ANDROID_ROOT=/usr/local/lib/android
             ANDROID_SDK_ROOT=$ANDROID_ROOT/sdk
             SDKMANAGER=$ANDROID_SDK_ROOT/cmdline-tools/latest/bin/sdkmanager