ci/android: add ci rules to test llvmpipe on Android

For future reference add some disabled rules to for running tests using
llvmpipe on Android, and for that to work also add
deqp-android-llvmpipe.toml

Reviewed-by: Eric Engestrom <None>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30895>

src/gallium/drivers/llvmpipe/ci/deqp-android-llvmpipe.toml

@@ -0,0 +1,10 @@
+[[deqp]]
+deqp = "/data/deqp/deqp-egl-android"
+caselists = ["/data/deqp/egl-main.txt"]
+deqp_args = [
+    "--deqp-surface-width=256",
+    "--deqp-surface-height=256",
+    "--deqp-surface-type=pbuffer",
+    "--deqp-gl-config-name=rgba8888d24s8ms0",
+    "--deqp-visibility=hidden"
+]

src/gallium/drivers/llvmpipe/ci/gitlab-ci.yml

@@ -61,3 +61,13 @@ llvmpipe-deqp-asan:
   needs:
     - debian/x86_64_test-gl
     - debian-testing-asan
+
+.android-llvmpipe:
+  extends:
+    - .test-android
+    - .llvmpipe-rules
+  variables:
+    ANDROID_GPU_MODE: guest_swiftshader
+    GPU_VERSION: llvmpipe
+    DEQP_SUITE: android-llvmpipe
+    # TODO: define DEQP_FRACTION?