Remove unused Android.mk under contexthub/firmware/app
The module names for these Android.mk files are `chre_test0`,
`chre_test1`, `chre_test2`, `libnanochre10`, `libnanochre11`,
`libnanochre`, `test0`, and `test1`.
After verification, these modules cannot build any targets in Android
because they all ultimately call $(BUILD_AUX_EXECUTABLE) or
$(BUILD_AUX_STATIC_LIBRARY), which has been deprecated in Android.
(Reference: build/make/core/deprecation.mk).
Furthermore, since these modules are not dependencies for any other
targets, it should be safe to remove them.
Bug: 340132545
Bug: 309902275
Test: N/A
Change-Id: Ie4b469b23a129e114783179830a3b8bffcbe5a6f
8 files changed
