Better build files for android bitness including #define tagging

QGCCommon.pri

@@ -46,12 +46,18 @@ linux {
         QMAKE_CFLAGS += -Wno-unused-command-line-argument
         QMAKE_LINK += -nostdlib++ # Hack fix?: https://forum.qt.io/topic/103713/error-cannot-find-lc-qt-5-12-android
         target.path = $$DESTDIR
-        equals(ANDROID_TARGET_ARCH, x86)  {
+        equals(ANDROID_TARGET_ARCH, armeabi-v7a)  {
+            DEFINES += __androidArm32__
+            message("Android Arm 32 bit build")
+        } else:equals(ANDROID_TARGET_ARCH, arm64-v8a)  {
+            DEFINES += __androidArm64__
+            message("Android Arm 64 bit build")
+        } else:equals(ANDROID_TARGET_ARCH, x86)  {
             CONFIG += Androidx86Build
             DEFINES += __androidx86__
-            message("Android x86 build")
-        } else {
             message("Android Arm build")
+        } else {
+            error("Unsupported Android architecture: $${ANDROID_TARGET_ARCH}")
         }
     } else {
         error("Unsuported Linux toolchain, only GCC 32- or 64-bit is supported")

QGCExternalLibs.pri

@@ -136,14 +136,16 @@ MacBuild {
 
 # Include Android OpenSSL libs in order to make Qt OpenSSL support work
 AndroidBuild {
-    contains(QT_ARCH, arm) {
+    equals(ANDROID_TARGET_ARCH, armeabi-v7a)  {
         ANDROID_EXTRA_LIBS += $$BASEDIR/libs/OpenSSL/Android/arch-armeabi-v7a/lib/libcrypto.so
         ANDROID_EXTRA_LIBS += $$BASEDIR/libs/OpenSSL/Android/arch-armeabi-v7a/lib/libssl.so
-    } else:contains(QT_ARCH, arm64) {
+    } else:equals(ANDROID_TARGET_ARCH, arm64-v8a)  {
         # Haven't figured out how to get 64 bit arm OpenSLL yet. This means things like terrain queries will not qork.
-    } else {
+    } else:equals(ANDROID_TARGET_ARCH, x86)  {
         ANDROID_EXTRA_LIBS += $$BASEDIR/libs/OpenSSL/Android/arch-x86/lib/libcrypto.so
         ANDROID_EXTRA_LIBS += $$BASEDIR/libs/OpenSSL/Android/arch-x86/lib/libssl.so
+    } else {
+        error("Unsupported Android architecture: $${ANDROID_TARGET_ARCH}")
     }
 }