Use ubuntu-24.04 Github runner in Android Github workflow

The ubuntu-20.04 actions runner image is deprecated will be fully
unsupported by 2025-04-01 (see https://github.com/actions/runner-images/issues/11101).

Change-Id: Ib6e25b5eef020aa5f3f183638725f7702903954a

.github/workflows/android.yml

diff --git a/.github/workflows/android.yml b/.github/workflows/android.yml
index d90a9bf..2251a2a 100644
--- a/.github/workflows/android.yml
+++ b/.github/workflows/android.yml
@@ -17,7 +17,7 @@
       fail-fast: true
       matrix:
         os:
-          - ubuntu-20.04
+          - ubuntu-24.04
         abi:
           - arm64-v8a
           - armeabi-v7a