Merge bitcoin/bitcoin#28633: ci: Install Qt's default Android API platform

78d3062 ci: Install Android API 31 platform as Qt expects (Hennadii Stepanov)

Pull request description:

  When building the `qt` package, it expects that the default (in Qt's view) Android API platform is installed.

  During the recent Qt version [update](bitcoin/bitcoin#28561), it has been changed:
  ```diff
  --- a/mkspecs/features/android/sdk.prf
  +++ b/mkspecs/features/android/sdk.prf
  @@ -1,6 +1,6 @@
   API_VERSION_TO_USE = $$(ANDROID_API_VERSION)
   isEmpty(API_VERSION_TO_USE): API_VERSION_TO_USE = $$API_VERSION
  -isEmpty(API_VERSION_TO_USE): API_VERSION_TO_USE = android-28
  +isEmpty(API_VERSION_TO_USE): API_VERSION_TO_USE = android-31

   ANDROID_JAR_FILE = $$ANDROID_SDK_ROOT/platforms/$$API_VERSION_TO_USE/android.jar
   !exists($$ANDROID_JAR_FILE) {
  ```

  This PR fixes the CI for the Android task and addresses bitcoin/bitcoin#28561 (comment).

  Qt [docs](https://doc.qt.io/qt-5/android.html) still claim that Android API Level 21 and up are supported, however, I did not test every possible configuration.

  NOTE: bitcoin/bitcoin#28611 is still valid.

ACKs for top commit:
  maflcko:
    lgtm ACK 78d3062
  jarolrod:
    tACK 78d3062

Tree-SHA512: 781fba6d80aae7e6500854de14af0d30169c258e395b9e482a5430a7b4a2211a6181f8c9ee58543c896b431abf09e3e7c5573b9672ed128658f11f98a2006e7e

Author: fanquake

ci/test/01_base_install.sh

@@ -99,7 +99,7 @@ if [ -n "$ANDROID_HOME" ] && [ ! -d "$ANDROID_HOME" ]; then
   fi
   mkdir -p "$ANDROID_HOME"
   unzip -o "$ANDROID_TOOLS_PATH" -d "$ANDROID_HOME"
-  yes | "${ANDROID_HOME}"/cmdline-tools/bin/sdkmanager --sdk_root="${ANDROID_HOME}" --install "build-tools;${ANDROID_BUILD_TOOLS_VERSION}" "platform-tools" "platforms;android-${ANDROID_API_LEVEL}" "ndk;${ANDROID_NDK_VERSION}"
+  yes | "${ANDROID_HOME}"/cmdline-tools/bin/sdkmanager --sdk_root="${ANDROID_HOME}" --install "build-tools;${ANDROID_BUILD_TOOLS_VERSION}" "platform-tools" "platforms;android-31" "platforms;android-${ANDROID_API_LEVEL}" "ndk;${ANDROID_NDK_VERSION}"
 fi
 
 git config --global ${CFG_DONE} "true"