Docs: Fixed language for section 3

- 3.2.3.2: Excluded the Settings app that third party apps can override.
- 3.15 : Replacing "ephemeral" with "instant".

Bug:111602321
Change-Id: Idb99d9fd42a7a0b06273674c041dbad583158d62

diff --git a/3_software/3_15_instant-apps.md b/3_software/3_15_instant-apps.md
index f8d290f..1091e81 100644
--- a/3_software/3_15_instant-apps.md
+++ b/3_software/3_15_instant-apps.md

@@ -3,8 +3,9 @@
 Device implementations MUST satisfy the following requirements:
 
 *   [C-0-1] Instant Apps MUST only be granted permissions that have the
-    [`android:protectionLevel`](https://developer.android.com/guide/topics/manifest/permission-element.html#plevel)
-    set to `"ephemeral"`.
+    [`android:protectionLevel`](
+    https://developer.android.com/reference/android/R.attr#protectionLevel)
+    set to `"instant"`.
 *   [C-0-2] Instant Apps MUST NOT interact with installed apps via [implicit intents](https://developer.android.com/reference/android/content/Intent.html)
     unless one of the following is true:
     *   The component's intent pattern filter is exposed and has CATEGORY_BROWSABLE

diff --git a/3_software/3_2_soft-api-compatibility.md b/3_software/3_2_soft-api-compatibility.md
index 9b05496..169347b 100644
--- a/3_software/3_2_soft-api-compatibility.md
+++ b/3_software/3_2_soft-api-compatibility.md

@@ -270,8 +270,9 @@
 
 *   [C-0-1] As Android is an extensible platform, device implementations MUST
 allow each intent pattern referenced in [section 3.2.3.1](#3_2_3_1_core_application_intents)
-to be overridden by third-party applications. The upstream Android open source
-implementation allows this by default.
+, except for Settings, to be overridden by third-party applications. The
+upstream Android open source implementation allows this by default.
+
 *   [C-0-2] Dvice implementers MUST NOT attach special privileges to system
 applications' use of these intent patterns, or prevent third-party applications
 from binding to and assuming control of these patterns. This prohibition