remove android project / gradle build scripts for cmake only builds

* Removes use of gradle in build-script.rs, not needed for build a purely native shared library and unifies code path to one cmake-only way of building the library
    * This change also fixes the issue of android builds on windows with openjdk compiler hangs indefinitely without running android-studio.

* Bump android compile-sdk from v34 to v35

* Bump android cmake from v3.22.0 to v3.30.3

.github/workflows/prepare-alxr-release.yml

@@ -312,7 +312,8 @@ jobs:
     env:
       RUST_BACKTRACE: 1
       ANDROID_NDK_ROOT: /usr/local/lib/android/sdk/ndk/27.1.12297006
-      ANDROID_NDK_HOME: $ANDROID_NDK_ROOT
+      ANDROID_NDK_HOME: /usr/local/lib/android/sdk/ndk/27.1.12297006
+      ANDROID_CMAKE_BIN: /usr/local/lib/android/sdk/cmake/3.30.3/bin
       JAVA_HOME: $JAVA_HOME_17_X64
     steps:
       - name: Checkout code
@@ -332,7 +333,7 @@ jobs:
           sudo apt update && sudo apt upgrade -y
           sudo apt install gcc-multilib
           SDK_MANAGER=$ANDROID_SDK_ROOT/cmdline-tools/latest/bin/sdkmanager
-          yes | sudo $SDK_MANAGER --install "ndk;27.1.12297006" "platforms;android-29"
+          yes | sudo $SDK_MANAGER --install "ndk;27.1.12297006" "platforms;android-29" "cmake;3.30.3"
 
           rustup target add aarch64-linux-android armv7-linux-androideabi x86_64-linux-android i686-linux-android
           cargo install cargo-apk --git https://github.com/korejan/cargo-apk.git --branch android-manifest-entries
@@ -344,13 +345,15 @@ jobs:
         run: |
           unset ANDROID_HOME
           JAVA_HOME=$JAVA_HOME_17_X64
+          export PATH=$ANDROID_CMAKE_BIN:$PATH
           cargo xtask build-alxr-android --generic --release
           cargo clean
       
       - name: Build & Package alxr-android-quest-release
         run: |
           unset ANDROID_HOME
           JAVA_HOME=$JAVA_HOME_17_X64
+          export PATH=$ANDROID_CMAKE_BIN:$PATH
           cargo xtask build-alxr-quest --release
           cargo clean
       
@@ -387,7 +390,8 @@ jobs:
     env:
       RUST_BACKTRACE: 1
       ANDROID_NDK_ROOT: /usr/local/lib/android/sdk/ndk/27.1.12297006
-      ANDROID_NDK_HOME: $ANDROID_NDK_ROOT
+      ANDROID_NDK_HOME: /usr/local/lib/android/sdk/ndk/27.1.12297006
+      ANDROID_CMAKE_BIN: /usr/local/lib/android/sdk/cmake/3.30.3/bin
       JAVA_HOME: $JAVA_HOME_17_X64
     steps:
       - name: Checkout code
@@ -407,7 +411,7 @@ jobs:
           sudo apt update && sudo apt upgrade -y
           sudo apt install gcc-multilib
           SDK_MANAGER=$ANDROID_SDK_ROOT/cmdline-tools/latest/bin/sdkmanager
-          yes | sudo $SDK_MANAGER --install "ndk;27.1.12297006" "platforms;android-29"
+          yes | sudo $SDK_MANAGER --install "ndk;27.1.12297006" "platforms;android-29" "cmake;3.30.3"
 
           rustup target add aarch64-linux-android armv7-linux-androideabi x86_64-linux-android i686-linux-android
           cargo install cargo-apk --git https://github.com/korejan/cargo-apk.git --branch android-manifest-entries
@@ -419,6 +423,7 @@ jobs:
         run: |
           unset ANDROID_HOME
           JAVA_HOME=$JAVA_HOME_17_X64
+          export PATH=$ANDROID_CMAKE_BIN:$PATH
           cargo xtask build-alxr-android --generic
           pushd ./build/debug/alxr_client_android
           mv alxr-client.apk alxr-client-debug.apk
@@ -429,6 +434,7 @@ jobs:
         run: |
           unset ANDROID_HOME
           JAVA_HOME=$JAVA_HOME_17_X64
+          export PATH=$ANDROID_CMAKE_BIN:$PATH
           cargo xtask build-alxr-pico
           pushd ./build/debug/alxr_client_android
           mv alxr-client-pico.apk alxr-client-pico-debug.apk

.github/workflows/rust.yml

@@ -207,7 +207,8 @@ jobs:
     runs-on: ubuntu-22.04
     env:
       ANDROID_NDK_ROOT: /usr/local/lib/android/sdk/ndk/27.1.12297006
-      ANDROID_NDK_HOME: $ANDROID_NDK_ROOT
+      ANDROID_NDK_HOME: /usr/local/lib/android/sdk/ndk/27.1.12297006
+      ANDROID_CMAKE_BIN: /usr/local/lib/android/sdk/cmake/3.30.3/bin
       RUST_BACKTRACE: 1
     steps:
       - uses: actions/checkout@v3
@@ -226,7 +227,7 @@ jobs:
           sudo apt install gcc-multilib
 
           SDK_MANAGER=$ANDROID_SDK_ROOT/cmdline-tools/latest/bin/sdkmanager
-          yes | sudo $SDK_MANAGER --install "ndk;27.1.12297006" "platforms;android-29"
+          yes | sudo $SDK_MANAGER --install "ndk;27.1.12297006" "platforms;android-29" "cmake;3.30.3"
 
           rustup target add aarch64-linux-android armv7-linux-androideabi x86_64-linux-android i686-linux-android
           cargo install cargo-apk --git https://github.com/korejan/cargo-apk.git --branch android-manifest-entries
@@ -238,12 +239,14 @@ jobs:
         run: |
           unset ANDROID_HOME
           JAVA_HOME=$JAVA_HOME_17_X64
+          export PATH=$ANDROID_CMAKE_BIN:$PATH
           cargo apk build -p alxr-client-android
       
       - name: Build alxr-android-pico
         run: |
           unset ANDROID_HOME
           JAVA_HOME=$JAVA_HOME_17_X64
+          export PATH=$ANDROID_CMAKE_BIN:$PATH
           cargo apk build -p alxr-client-pico --target-dir=target/pico
 
   tests: