[android] move NDK version to workflow input

There are several jobs in the swift-toolchain workflow that build
against the Android NDK, and they all specify the same r26b version.

This change extracts the NDK version to workflow input so that it needs
only be specified in one place.

Author: andrurogerz

.github/workflows/build-toolchain.yml

@@ -142,6 +142,7 @@ jobs:
       ANDROID_CMAKE_CXX_FLAGS: ${{ steps.context.outputs.ANDROID_CMAKE_CXX_FLAGS }}
       ANDROID_CMAKE_EXE_LINKER_FLAGS: ${{ steps.context.outputs.ANDROID_CMAKE_EXE_LINKER_FLAGS }}
       ANDROID_CMAKE_SHARED_LINKER_FLAGS: ${{ steps.context.outputs.ANDROID_CMAKE_SHARED_LINKER_FLAGS }}
+      ANDROID_NDK_VERSION: ${{ steps.context.outputs.ANDROID_NDK_VERSION }}
       CMAKE_Swift_FLAGS: ${{ steps.context.outputs.CMAKE_Swift_FLAGS }}
       debug_info: ${{ steps.context.outputs.debug_info }}
       signed: ${{ steps.context.outputs.signed }}
@@ -274,6 +275,7 @@ jobs:
           echo mac_build_runner=macos-latest >> ${GITHUB_OUTPUT}
 
           echo ANDROID_API_LEVEL=${{ inputs.android_api_level }} >> ${GITHUB_OUTPUT}
+          echo ANDROID_NDK_VERSION=r26b >> ${GITHUB_OUTPUT}
 
       - uses: actions/upload-artifact@v4
         with:
@@ -381,6 +383,7 @@ jobs:
       ANDROID_CMAKE_CXX_FLAGS: ${{ needs.context.outputs.ANDROID_CMAKE_CXX_FLAGS }}
       ANDROID_CMAKE_EXE_LINKER_FLAGS: ${{ needs.context.outputs.ANDROID_CMAKE_EXE_LINKER_FLAGS }}
       ANDROID_CMAKE_SHARED_LINKER_FLAGS: ${{ needs.context.outputs.ANDROID_CMAKE_SHARED_LINKER_FLAGS }}
+      ANDROID_NDK_VERSION: ${{ needs.context.outputs.ANDROID_NDK_VERSION }}
       CMAKE_Swift_FLAGS: ${{ needs.context.outputs.CMAKE_Swift_FLAGS }}
       debug_info: ${{ needs.context.outputs.debug_info }}
       signed: ${{ needs.context.outputs.signed }}

.github/workflows/swift-toolchain.yml

@@ -159,6 +159,10 @@ on:
         required: true
         type: string
 
+      ANDROID_NDK_VERSION:
+        required: true
+        type: string
+
       WINDOWS_CMAKE_C_FLAGS:
         required: true
         type: string
@@ -428,7 +432,7 @@ jobs:
       - uses: nttld/setup-ndk@v1
         id: setup-ndk
         with:
-          ndk-version: r26b
+          ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure DS2
         run: |
@@ -756,7 +760,7 @@ jobs:
       - uses: nttld/setup-ndk@v1
         id: setup-ndk
         with:
-          ndk-version: r26b
+          ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Compute workspace hash
         id: workspace_hash
@@ -1026,7 +1030,7 @@ jobs:
       - uses: nttld/setup-ndk@v1
         id: setup-ndk
         with:
-          ndk-version: r26b
+          ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure zlib
         run: |
@@ -1168,7 +1172,7 @@ jobs:
       - uses: nttld/setup-ndk@v1
         id: setup-ndk
         with:
-          ndk-version: r26b
+          ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure curl
         run: |
@@ -1381,7 +1385,7 @@ jobs:
       - uses: nttld/setup-ndk@v1
         id: setup-ndk
         with:
-          ndk-version: r26b
+          ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure libxml2
         run: |
@@ -1592,7 +1596,7 @@ jobs:
       - uses: nttld/setup-ndk@v1
         id: setup-ndk
         with:
-          ndk-version: r26b
+          ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure LLVM
         run: |
@@ -2085,7 +2089,7 @@ jobs:
       - uses: nttld/setup-ndk@v1
         id: setup-ndk
         with:
-          ndk-version: r26b
+          ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure libdispatch
         run: |