cmake: Update absl.cmake

Use Find<module>.cmake instead of <module>config.cmake to remove absl_DIR hack.

PiperOrigin-RevId: 356438974
Change-Id: I5de67e21c2e55cad20ce3da002260acdd98c06b3

tensorflow/lite/CMakeLists.txt

@@ -57,8 +57,6 @@ set(CMAKE_PREFIX_PATH
   "${TFLITE_SOURCE_DIR}/tools/cmake/modules"
   ${CMAKE_PREFIX_PATH}
 )
-# b/168750039: To workaround absl module not found error on Android build.
-set(absl_DIR "${TFLITE_SOURCE_DIR}/tools/cmake/modules")
 
 option(TFLITE_ENABLE_RUY "Enable experimental RUY integration" OFF)
 option(TFLITE_ENABLE_RESOURCE "Enable experimental support for resources" ON)
@@ -125,7 +123,7 @@ macro(populate_tf_source_vars RELATIVE_DIR SOURCES_VAR)
   )
 endmacro()
 # Find TensorFlow Lite dependencies.
-find_package(absl REQUIRED CONFIG)
+find_package(absl REQUIRED)
 find_package(eigen REQUIRED)
 find_package(farmhash REQUIRED)
 find_package(fft2d REQUIRED)