Add python requirements for TVM and android_camera, use preinstalled NDK

Author: argrento

.github/workflows/main.yml

@@ -144,7 +144,7 @@ jobs:
         run: |
           mkdir -p app/src/main/assets/models/
           export TVM_NDK_CC=${ANDROID_NDK_HOME}/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android30-clang++
-          export TVM_HOME=~/work/tvm/tvm
+          export TVM_HOME=~/work/tvm/tvm/
           export PYTHONPATH=$TVM_HOME/python:${PYTHONPATH}
           python3 ../../python/gen_requirements.py
           pip3 install -r ../../python/requirements/core.txt